Beef and Bean Burgers UncategorizedBean Bulletin For backyard barbecues or easy weekend suppers, stretching ground beef with beans is a good way to cut your grocery budget and add a little extra fiber to hamburgers. Combine 3 cups of any type of lightly mashed beans with one pound of ground beef. Stir in ½ cup chopped onion and a beaten egg. Season with salt and pepper. Form into 8 patties and sauté in a frying pan or cook them on a grill.