Sweet Onion Mayonnaise

How to make Sweet Onion Mayonnaise Recipe - This mayo is best enjoyed after an overnight stay in the refrigerator to allow the flavors to blend.

Ingredients:
1/4 cup finely chopped sweet onion
1/4 cup mayonnaise
1/2 cup sour cream
1 tablespoon white vinegar
2 teaspoons celery salt
1 teaspoon dry mustard

Method:
Mix all ingredients together and refrigerate at least 1 hour before serving. Store in the refrigerator for up to one week. Makes about 1 cup