Onion Salad Dressing

1/4 cup apple cider vinegar 3/4 cup granulated sugar 1 medium onion, roughly chopped 1 teaspoon salt 1/2 teaspoon celery seeds 1/2 teaspoon ground mustard 1/8 teaspoon rosemary 1/8 teaspoon pepper 1 cup vegetable oil Directions: Blend vinegar, sugar, and onion. Add remaining ingredients and blend until desired consistency achieved.