Season meat with salt and pepper and roll into the flour. Brown in shortening. Add onions and boiling water. Simmer for 1/2 hour. Add tomatoes, potatoes, Worcestershire sauce and carrots. Simmer over low heat until meat and vegetables are tender. Remove meat and vegetables to a casserole dish and thicken stock with flour mixed with water. Pour thickened stock over meat and vegetables. Cover with biscuits. Bake in a 425ºF. oven for 20 to 25 minutes. Serve hot. Serves 6 hungry folks!