This lean, delicious tilapia is a snap to prepare and bake. The fish takes just minutes to fix and cook. The fillets are served with a tasty green onion, lime, cilantro cream sauce. Serve the fish the sauce and hot cooked rice or baked or roasted potatoes. Add steamed vegetables for a perfect family meal. A serving of fish, according to the american heart association, is about the size of a checkbook, or about 3. 5 ounces cooked. They recommend two servings of fish a week. As an added bonus, tilapia is not only mild and budget-friendly, it's low in mercury.