This is a slightly different poppy seed dressing from the one that Briste posted a while ago.
1/2 cup sugar
1 teaspoon dry mustard
1 teaspoon salt
1/3 cup vinegar
1 1/2 tablespoons minced onion
1 cup salad oil (vegetable oil)
1 1/2 tablespoons poppy seeds
Mix all the ingredients together except for the poppy seeds. Beat until creamy and then add the poppy seeds. Mix well.
Enjoy with your favorite greens!