Legumes are low in fat and high in fiber. Common legumes include beans, peas and lentils. Here are some tips for adding these nutritional powerhouses to your diet: 1. Add beans, peas or lentils to soups, stews, and casseroles. 2. Use pureed beans as the basis for dips and spreads. 3. Add chickpeas or black beans to salads. 4. Snack on a handful of soy nuts rather than on chips or crackers.