Swiss Salad
["1 small onion, chopped", "1/4 c. vinegar", "1/4 c. oil", "1 tsp. salt", "1/4 tsp. pepper", "1 1/4 tsp. prepared mustard", "few drops Worcestershire sauce", "2 to 3 Tbsp. milk", "1 Tbsp. parsley", "lettuce, torn into bite-size pieces", "tomatoes, cut in wedges"]
["Mix all ingredients, except lettuce and tomatoes.", "Chill. Pour over lettuce and tomato wedges at serving time."]
["onion", "vinegar", "oil", "salt", "pepper", "mustard", "Worcestershire sauce", "milk", "parsley", "tomatoes"]