Preheat oven to 350°F
Thaw corn
Chop onion
Drain green chilis
Rinse and drain black beans
Chop Tomato
Spray casserole dish with cooking spray
Lay tilapia filets in the casserole dish
Drizzle filets with lime juice
Preheat skillet over medium heat
Saute garlic and onion over medium heat in preheated skillet
Add green chilis, cumin, chili powder, black beans, corn and tomatoes
Stir frequently while sauteing for 5 minutes
Add cilantro
Spoon sauce over the fish
Cover casserole dish with foil
Bake for 30 minutes in preheated oven
Serve