Creamy House Dressing

Ingredients

• 1/2 medium onion chopped in 3 or 4 pieces
• 1 teaspoon celery seed
• 1 tablespoon yellow mustard prepared
• 2 tablespoons mayonnaise
• 1/4 cup sugar
• 1 teaspoon salt
• 1/2 teaspoon pepper
• 1/3 cup white wine vinegar
• 1 cup oil I use sunflower oil