Heat the butter in a saucepan, add the onion and chop the rest of the ingredients. When the onions get color; Add Tat Mixed Vegetables, Tat Corn, Tat Walnut Paste, meat broth, salt, pepper and mix. Cook at a low heat. Then put it in stew containers. Sprinkle with grated cheese, gratin in a 200 degree hot oven and serve hot.