Preheat the oven to 350°F (175°C).
In a pan over medium heat, add olive oil and sauté the onions until they are translucent.
Add the minced garlic and spinach to the pan and cook until the spinach is wilted.
Stir in the cumin powder and remove from heat.
Spread a small amount of enchilada sauce on the bottom of a baking dish.
Take each tortilla and fill with the spinach mixture and a sprinkle of cheese. Roll up and place seam-side down in the baking dish.
Once all tortillas are rolled and placed in the dish, pour the remaining enchilada sauce over the top and sprinkle with remaining cheese.
Bake in the preheated oven for 20-25 minutes until the cheese is melted and bubbly.
Serve hot, garnished with additional toppings if desired, like sour cream or chopped cilantro.