Blot dry the fillets with paper towels. Preheat the oven to 350 degrees F. Brush olive oil on top and bottom. Set on baking sheet with skin side down.
Sprinkle on salt and pepper as well as any other seasonings you'd like. Sprinkle and spread minced garlic on flesh side. Put a small pat of butter on the top of each piece, optional.
Slice lemon and place on top of each piece too, optional. Bake in oven for 13-15 minutes or until flaky. Serve.