If you’re craving something light, flavorful, and slightly fancy without spending hours in the kitchen, Mushroom and Spinach Stuffed Flounder is the perfect choice. This dish delivers restaurant-quality flavor with minimal effort, making it ideal for both a quick weeknight meal and an impressive dinner for guests.
Flounder, a delicate white fish, has a mild flavor and a tender texture that pairs beautifully with earthy mushrooms and leafy spinach. The filling starts with sautéed mushrooms, garlic, and onions, cooked until golden and aromatic. Add a handful of fresh spinach to the skillet until wilted, then stir in a touch of cream cheese or ricotta to bind everything together into a rich, savory filling.
To assemble, simply spoon the mixture onto each fillet, roll them up gently, and secure with a toothpick if needed. A drizzle of lemon juice and a sprinkle of paprika or parmesan on top adds brightness and a touch of color. Bake the fish just until flaky and tender, about 15 to 20 minutes.
Not only is this meal high in protein and low in carbs, but it’s also incredibly satisfying without feeling heavy. Serve it with a side of steamed veggies, cauliflower mash, or a simple green salad for a complete and balanced dinner.
What makes this recipe so special is how easily it elevates everyday ingredients. The combination of spinach and mushrooms offers a lovely contrast of flavors and textures, while the mild flounder lets those ingredients shine.
Whether you’re trying to eat lighter, impress guests, or simply break out of a dinner rut, Mushroom and Spinach Stuffed Flounder is a must-try. It’s elegant, wholesome, and proof that great meals don’t have to be complicated.
To complement the rich flavors of the Mushroom and Spinach Stuffed Flounder, consider serving it with a side of steamed vegetables or a fresh salad. For a heartier meal, you can also pair it with some wild rice or roasted potatoes. To enhance the dining experience, a glass of crisp white wine or a light-bodied red wine would perfectly complement the flavors of this dish.

Ingredients
- 4 flounder fillets
- 2 cups mushrooms sliced
- 2 cups spinach fresh
- 1/2 cup onion diced
- 2 cloves garlic minced
- 1/2 cup parmesan cheese grated
- 1/4 cup bread crumbs
- 2 tbsp olive oil
- Salt and pepper to taste
Instructions
- Preheat oven to 375 degrees F (190 degrees C).
- In a large skillet, heat olive oil over medium heat. Add diced onion and minced garlic, and cook until onion is translucent.
- Add sliced mushrooms to the skillet and cook until softened. Stir in fresh spinach and cook until wilted. Remove from heat.
- In a small bowl, combine grated Parmesan cheese and bread crumbs. Season with salt and pepper.
- Lay flounder fillets flat on a clean surface. Spoon the mushroom and spinach mixture onto each fillet. Sprinkle the Parmesan and bread crumb mixture on top.
- Roll up the fillets and secure with toothpicks. Place the stuffed flounder in a baking dish.
- Bake in the preheated oven for 20-25 minutes, or until fish flakes easily with a fork.
- Serve hot and enjoy!
So fancy! Made it for a dinner party and everyone was so impressed. Thanks for sharing!
Eh, honestly it was kinda bland. I added some lemon juice and it helped a bit, but still didn’t wow me. 🤷♂️
I get what you mean. I tried it too and thought it was kinda plain. Maybe trying some spices could help? 🤔
Great recipe! Only thing is, I used cheddar instead of Parmesan ’cause that’s what I had. Still yum!
Too complex for me 😩 I’ll just stick to frying fish next time.
I get you! Frying fish is way easier. But this stuffed fish sounds fancy! Maybe you can try it someday? 😊
I didn’t have Parmesan, so I used cheddar. Not sure if that was right.
Delish! I switched spinach for kale, and it worked out fine. Easy and quick meal!
So good! I didn’t have any spinach so I used kale instead, it worked perfectly! 😋
yum, fish!!!
This recipe is fine but I burnt mine a little…that’s on me though. Pay attention to the time.
Isn’t flounder too expensive? Why not use tilapia? Taste dont matter to me anyways, fish is fish!
This was fantastic! Everyone loved it at dinner. The flavors blended perfectly!
That sounds amazing! Can’t wait to try this recipe myself. Thanks for sharing!
Not my thing. The mushrooms were too strong for me and my kids didn’t like the texture.
I get what you mean! Mushrooms can be a bit much sometimes. Have you tried other stuffings? Maybe cheese and herbs would be better for the kids.
Honestly, I think the mushroom flavor is great! But I guess not everyone likes it. Just swap them out next time or make it without! No biggie.
Do I really have to roll the fillets? Seems like too much work for fish.
I’m not great in the kitchen, but this was pretty easy to follow. I managed to mess up the rolling part tho… still tasted good haha.
I didn’t have fresh spinach, so I used frozen, and it turned out mushy. Maybe fresh is a must.
My family is picky with fish, but they actually ate it! Mushroom and spinach made it good!
Too many steps for my liking! Cooking should be quick and easy. I just baked the fish with salt and pepper instead. Much simpler!
I get that! Sometimes, less is more. Baking fish is definitely easier! But this recipe is really tasty if you have some time. 😊
This recipe is absolutely delicious! The flavors blend so well together. Definitely a keeper!
Glad you enjoyed it! It’s always a hit at my family meals too.
I forgot the toothpicks and it all fell apart during baking. Still tasted good though.
Sounds delicious! Next time, maybe use a different method to hold them together? But glad it still tasted good! 😊
Wow, please! That’s a lot of steps. Can’t we just fry the fish and call it a day?
I get what you’re saying! But sometimes the extra steps really make a dish special. This one sounds worth it! 🌟
Nah, not for me. Fish and mushrooms? That’s just wrong! I’ll stick with chicken.
Is flounder the same as tilapia? Not sure if I did it right. But it tasted ok.
What?? I thought they were the same fish 😂. Still, if it tasted good, that’s all that matters!
Flounder and tilapia are not the same, but they’re similar. Glad your dish turned out ok!
Followed every step and it was perfect! My family loved it, especially my picky daughter.
Such a simple recipe! I didn’t have flounder, used cod instead and it turned out great!
This was absolutely delicious! The flavors blended so well together. Will definitively make again!
Honestly, who needs breadcrumbs? Just seems unnecessary, my stuff turned out mushy. Not super tasty 😒
Very easy to make! I just added some spices and it was perfect. Thanks!
This was surprisingly good! I never thought of using flounder like this. Will definitely make again!
I think I messed it up. I used frozen spinach instead of fresh. Tasted weird.
I wouldn’t worry too much! Frozen spinach is actually fine for cooking; it just has more moisture. Maybe try squeezing it out next time! 😊
I had a tough time with the rolling part. Ended up with a mess. But the taste was okay.
Wow, this recipe is amazing! I loved the flavor of the mushrooms and spinach with the flounder. So delightful!
Thanks for sharing your experience! I can’t wait to try this recipe myself.
Just tried this and my kitchen smells so good! Can’t wait to taste!
I’m so glad to hear that! The aroma is half the fun, isn’t it? Enjoy the flavors!
This dish is so fancy! I made it for a dinner party, and everyone loved it. Thanks for sharing!
Fancy? Really? Looks complicated. Can’t imagine my fam liking fish with mushrooms. 😕
I’m so glad to hear that! This recipe really impresses guests. What sides did you serve with it?
This recipe was a hit at our dinner party! The flavors are amazing. Will definitely make again!
I was skeptical at first, but wow! This is delicious. I did substitute the flounder for tilapia and it still turned out great!
Good recipe but needed more spices. Salt and pepper ain’t enough for fish!
I totally agree! I added cayenne pepper and it made such a difference. Spices really bring out the flavor in fish! 👍
More spices? I thought it was fine as it was. Can’t go wrong with salt and pepper, right? 🤷♂️
Yum! Made this last night for a dinner party and everyone raved about it! A real keeper! 🎉🍽️
Good flavor, but I think I put too much garlic. I might try less next time.
Delicious! Simple ingredients but came together nicely. Flounder is my favorite!
Sounds good but I don’t know about mushrooms. Aren’t they kinda slimy? Just curious if it’ll taste good or not.
I totally agree! Flounder is the best, and this recipe sounds so easy to follow! Can’t wait to try it! 😍
This recipe is amazing! My family loved it, and I’ll definitely make it again.
Why would you put mushrooms in fish? That’s just weird. I like the fish plain.
I used haddock instead of flounder, and it turned out great! Nothing bad about that.
I dunno, felt like there was something missing. Maybe a sauce would help? 🤔
OMG, this is the best! 😍 I added a bit of lemon juice for some extra zing. Highly recommend!
Lemon juice sounds like a great idea! I’ll have to try that next time. Thanks for the tip!
Yum! I appreciate the simple steps. I just added more garlic because garlic makes everything better!
Garlic is definitely the king of flavors! Can’t wait to try this with your twist!
Mushrooms and spinach? Yuck! I don’t know why anyone would want to mix those.
Nah, spinach ain’t good with nothin. Just stick to cheese and meat. Who needs this weird stuff?
I used to think mushrooms were gross too, but this recipe changed my mind! Give it a shot before you dismiss it.
Yum! I added some lemon zest and it brightened up the dish! Thanks for sharing!
Lemon zest is a genius idea! I can’t wait to try that next time. Thanks for the tip!
Yum! I used frozen spinach and it turned out great! So easy and tasty! 😋
Frozen spinach is a smart choice! Glad it worked out for you! 😄
Great recipe! Used different cheese because I was out of parmesan. Still good!
Glad to hear you enjoyed it! What cheese did you use instead?
Cheese is cheese, right? I dunno about that. Parmesan gotta be the best for this!
Not worth making again. The flavors were just bland…maybe more spice next time?
Easy peasy! Quick to make and my kids gobbled it up. Will make again!
Honestly, I was skeptical about stuffed fish, but this turned out pretty decent. My kids even liked it!
This is kinda fancy for me. I’ll stick to my fish sticks, thanks!
Is flounder fish even healthy? I heard good things about salmon. Anyway, my kids loved it!
This recipe is fantastic! Never thought of stuffing fish like this, and the flavors are just perfect. My family loved it! 👍
Not my fav. Thought it would be more flavorful. Also, isn’t spinach bad for fish? Just sayin’.
I dunno, it was kinda bland for me. I added some lemon but still felt it was missing something.
I totally get what you mean! I thought it could use a bit more seasoning too. Maybe some garlic powder or paprika next time?
I tried this recipe but it didn’t come out right. The mushrooms were too soggy. I think I cooked them too long.
This was too complicated for me. I prefer simpler recipes. I’m not a chef, you know.
I totally get it! Some recipes really are over the top. Maybe try something really easy like a pasta dish next time?
Easy to make! I never cooked flounder before, but this turned out great. I will make it again!
It was alright but took too long to prepare. I thought it would be easier, honestly.
I totally get it! Some recipes just seem to take forever. But did you try preparing some ingredients beforehand? Makes it easier! 😊