1/2 cup grated parmesan cheese
1/4 cup butter, softened
4 tablespoons gluten free mayonnaise
2 tablespoons fresh lemon juice
1/2 teaspoon garlic powder, or to taste
1/4 teaspoon dried basil
1/2 teaspoon black pepper
1/8 teaspoon onion powder
1/8 teaspoon celery salt
2 pounds tilapia fillets
Set oven to broiler heat. Grease a broiler pan, then line with foil and grease the foil slightly.
In a small bowl mix together Parmesan cheese, butter, mayo, lemon juice and garlic. Add in all the remaining seasonings and salt if using; mix well and set aside.
Arrange the fillets in a single layer on the prepared pan (you sprinkle salt on fish but it is not necessary).
Broil a few inches from the heat for about 2-3 minutes.
Turn the fish over and broil a couple minutes more. Remove from oven and cover them with the Parmesan mixture on the top side only.Return to oven and broil for about 2 minutes more or until the topping is browned and the fish flakes easily (do not overcook the fish!).