In a large mixing bowl, combine the shredded turkey, breadcrumbs, Parmesan cheese, parsley, mayonnaise, onion, garlic, egg, salt, and black pepper.
Mix until well combined.
Shape the mixture into small patties or balls, about 2 inches in diameter.
Dredge the patties or balls in flour, shaking off any excess.
In a large skillet, heat the vegetable oil over medium heat.
Working in batches, fry the croquettes until golden brown and crispy, about 3-4 minutes per side.
Remove the croquettes from the skillet and place them on a paper towel-lined plate to drain excess oil.
Serve the turkey croquettes hot with your favorite dipping sauce or condiments.
Enjoy!