1)In a medium saucepan add onion and garlic in butter and saute till tender.
2)Add tomato, Worcestershire sauce, red wine vinegar, salt, chilly powder and dry mustard in the pan and let it boil.
3)Simmer the mixture for 30 minutes , stirring occasionally, by adding corn syrup into it.
4)Serve it with grilled beef or ribs.
Sauce can be used to baste beef or ribs when grilling.