Finely chop the onion, pass the garlic through a press and fry in vegetable oil until soft, then add the grated tomatoes. Stew until the sauce is thick.
Pass the beans through a meat grinder, egg yolk, tomato sauce, salt and pepper to taste. Mix well.
Roll small balls, dip in whipped protein, then roll in breadcrumbs. Fry in vegetable oil until golden brown on all sides.
Meatballs are ready, but if they seem dry then cook a tomato or other sauce and simmer meatballs in it for 10 minutes.
Bean meatballs are not only tasty, but also useful, such a dish is perfect for vegetarians, if you do not eat eggs then just exclude it and add a little olive oil so that the mass is more sticky and does not break up during cooking. On top of the meatballs are crispy, and tender on the inside, you can use any kind of beans for cooking.