1 can Campbell's tomato soup
1/4 c. vinegar
1/2 c. salad oil
1 tbsp. minced onion
2 tbsp. sugar
2 tsp. dry mustard
1 tsp. salt
1/4 tsp. pepper

Combine all ingredients in 1 quart jar. Shake well before using. Makes about 2 1/4 cups.