Spinach Salad Dressing
["1 medium onion", "1 tsp. salt", "1 tsp. celery seed", "1/2 c. vinegar", "2/3 c. sugar", "1/2 tsp. pepper", "1 tsp. Dijon mustard", "1 c. salad oil"]
["Blend all ingredients until smooth."]
["onion", "salt", "celery", "vinegar", "sugar", "pepper", "mustard", "salad oil"]