1. Cook beef with onions in its own fat until beef loses its pink color, stirring to break apart. Drain or skim off excess fat. 2. Sprinkle flour over beef; continue cooking until flour is absorbed. 3. Add tomatoes, mace or nutmeg, salt and pepper. Stir well. Simmer 10 to 15 minutes. 4. Serve over Toast, biscuits, rice or pasta.