Ingredients

1 cup vegetable oil3/4 cup cider vinegar1 medium onion, cut into wedges1/2 cup ketchup1/4 cup sugar1 teaspoon salt1 teaspoon ground mustard1/4 teaspoon garlic powder1/4 teaspoon pepper

Preparation

In a blender, combine all ingredients; cover and process until smooth. Store in the refrigerator.