Preheat oven to 375 degrees F. Coat a baking dish with olive oil.
Rinse tilapia fillets and pat dry.
Place fish in a 13x9 baking dish. Pour lemon juice over the fish, then drizzle olive oil on top. Sprinkle with garlic, parsley, and pepper.
Bake in preheated oven at 375 degrees F for 20-25 minutes, until the fish flakes with a fork.
Serve immediately.