Spinach Salad - cooking recipe

Ingredients

1/3 c. red wine vinegar
1/2 c. sugar
1 c. salad oil (Wesson canola)
1 tsp. salt
1 tsp. dry mustard
2 Tbsp. water
1/4 c. chopped onion

Preparation

Put all ingredients in blender until smooth. Refrigerate until well chilled.