Use a preheated oven. Line the baking tray with foil, to help cook more evenly and for easy cleanup! Make sure to pat the tilapia dry before placing it in the baking tray. You can marinade ahead if time permits and up to 1 day ahead. Do not overcook the fillets. otherwise, they may turn out a little chewy. Chili pepper is optional, de-seed, and takes out the ribs for a milder taste. You can swap out tilapia for other white fish if you desire. For a more tangy taste, swap the lemons for limes.