I can never find enough ways to prepare Tilapia.  It's one of our favorite fishes and we eat it often.  I thought this was really good!

Broiled Tilapia Parmesan
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1/2 cup Parmesan cheese
1/4 cup butter, softened
3 Tablespoons mayonnaise
2 Tablespoons fresh lemon juice
1/4 teaspoon dried basil
1/4 teaspoon ground black pepper
1/8 teaspoon onion powder
1/8 teaspoon celery salt
2 pounds tilapia fillets

Preheat your oven's broiler.  Grease a broiling pan or line pan with aluminum foil.  In a small bowl, mix together the Parmesan cheese, butter, mayonnaise and lemon juice.  Season with dried basil, pepper, onion powder and celery salt.  Mix well and set aside.  Arrange fillets in a single layer on a prepared pan.  Broil  a few inches from the heat for 2-3 minutes.  Flip the fillets over and broil for a couple more minutes.  Remove the fillets from the oven and cover them with the Parmesan cheese mixture on the top side.  Broil for 2 more minutes or until the topping is browned and fish flakes easily with a fork.  Be careful not to over cook the fish.