Marinated Tomato And Cucumber Salad
["3 medium tomatoes, cut in wedges", "2 medium cucumbers, sliced thin (do not peel)", "1 small onion, sliced thin and separated into rings", "1/4 c. cider vinegar", "1/4 c. vegetable oil", "3 Tbsp. mayonnaise or salad dressing", "2 Tbsp. sugar", "1/2 tsp. salt"]
["Combine tomato wedges and cucumber and onion slices in a large bowl; set aside.", "Combine vinegar, oil, mayonnaise, sugar and salt.", "Beat using a wire whisk until smooth.", "Pour dressing over tomato mixture, tossing gently.", "Cover and chill at least 2 hours, stirring occasionally.", "Serve with slotted spoon.", "Yields 6 servings."]
["tomatoes", "cucumbers", "onion", "cider vinegar", "vegetable oil", "mayonnaise", "sugar", "salt"]