Seasoned salt Additional Dijon mustard Combine sour cream, mayonnaise, Dijon mustard and onion. Add seasoned salt to taste. Chill at least 1 hour to blend flavours. Pour into serving bowl. Garnish by swirling a small amount of mustard onto surface of dip. Serve with an assortment of cut up fresh vegetables. Makes 1.5 cups (375mL) of dip.