Grill the pineapple slices for about 3 minutes per side.
Cube the grilled pineapple and combine with tomato, cilantro, jalapeno pepper, and lime juice. Set aside.
Preheat oven to 400 degrees Fahrenheit.
Brush tilapia fillets with cooking oil then sprinkle some salt, pepper, chili powder, and garlic powder.
Place an aluminum foil over a baking tray and coat with cooking oil.
Arrange the tilapia over the baking tray then bake for 5 to 7 minutes.
Transfer the baked tilapia to a serving dish then place the pineapple salsa mixture on the side.
Serve. Share and enjoy!