1 The grain found in rice actually helps the digestive system process other foods more easily. 2  Green Leafy Vegetables. 3  Vegetables are another top common food that is easy to digest. 4  Vegetables contain ruffage which promotes a healthy digestive system and helps clean out other foods that do not digest as well. Buttered Toast. 2  This is another food that makes the top foods that are easy to digest. 3  Again, bread is a simple grain like rice, therefore it automatically helps the digestive system process other foods better. 4  Using low-fat butter and toasting the bread gives it flavor and texture without too much flavor. 5  Chicken.