This baked tilapia is quick and easy to prepare, and the mild and delicious fillets bake in about 15 minutes. The sour cream sauce flavors the mild tilapia fillets perfectly. It's best with fresh dill and parsley, but you can substitute a teaspoon or two of dried dill in a pinch. Roasted potatoes are a nice side dish to serve with the tilapia, or serve the fish with rice and a side vegetable or salad. Allow about 4 to 6 ounces of tilapia per serving.