Preheat the broiler. Pat the tilapia dry with a paper towel. Place on a baking sheet lined with foil. Coat the foil with cooking spray or olive oil to prevent sticking.
Sprinkle each fish filets with 2 tablespoons of Parmesan cheese. Broil for 10-11 minutes or until the fish is no longer translucent and the cheese is browned on the top.
Top each filet with fresh tomatoes and a tablespoon of pesto. If you have extra Parmesan, add just a tiny bit over the top of the fish, tomatoes, and pesto - it can look really pretty. :) Top with salt, pepper, lemon juice, and/or melted butter.
Recipe by Pinch of Yum at http://pinchofyum.com/parmesan-pesto-tilapia