Bitochki with sour cream is a classic of Russian home cooking. You can use any minced meat for meat cutlets. It's good if it's mixed. But if there is only one type of meat, this is not a reason to postpone cooking until better times. The sour cream for the sauce should be full fat, at least 20%. This will give the dish a creamier and more delicate taste. If desired, the minced meat can be diluted with vegetables, such as zucchini or cauliflower. And replace the onions with green onions.