In a blender, combine all ingredients; cover and process until smooth. Store in the refrigerator.
Difficulty: ................. beginners Preparation: ............ about 10 minutes Servings: ................. 22
1 cup vegetable oil 3/4 cup cider vinegar 1 medium onion, cut into wedges 1/2 cup ketchup 1/4 cup sugar 1 teaspoon salt 1 teaspoon ground mustard 1/4 teaspoon garlic powder 1/4 teaspoon pepper