We've made this several times (again starting in Lent), and it always looks and tastes so good. It came from AllRecipes originially, but we tweak it every time. Most recently we added a little bit of ranch dressing, which was delicious. I've only made it with frozen tilapia fillets, and I'm sure it's even better with fresh fish. It's fast too--start to finish in 10 minutes!
Parmesan Broiled Tilapia
2 pounds tilapia fillets
1/2 cup Parmesan cheese
1/4 cup butter (I only used about 2 Tbsp)
2 Tbsp mayonaisse (can cut back)
1 Tbsp ranch dressing
1/2 Tbsp mustard
2 Tbsp lemon juice (I used lime juice)
1/4 tsp dried basil
1/4 tsp black pepper
1/8 onion powder (didn't have any)
1/8 tsp garlic powder
Preheat broiler. Line pan or baking sheet with aluminum foil.
Mix together parmesan cheese, butter, mayo, ranch, and mustard. Season with basil, pepper, onion powder and garlic powder. Set aside.
Arrange fillets on a single layer on the baking sheet. Broil a few inches from the heat for three minutes. Flip the fillets over and broil three more minutes. Remove the fillets from the oven and cover them with the parmesan mixture on the top side. Broil for 2-3 more minutes or until the topping is brown.