Want to gain muscles but avoiding fat from animal protein? Try beans as a substitute. Beans are generally very high in fibre, as well as in protein.- Add them to soup or salads- Choose dishes with beans- Use pureed beans as the basis for dips and spreadsBeans can lead to the formation of intestinal gas. When cooking beans, simmer it slowly until they are tender. This makes them easier to digest. As you add more beans to your diet, drink enough water and exercise regularly to help your gastrointestinal system handle the increase in dietary fibre.