INSTRUCTIONS
1. In a saucepan over medium heat, warm the oil. Add the onion and garlic and cook gently, stirring, for about 5 minutes. Add the ketchup, vinegar, Worcestershire sauce, sugar, chili powder and cayenne, to taste (the more cayenne you use, the hotter it will be). Reduce the heat and simmer, partially covered, until the sauce has thickened slightly, about 20 minutes.