1/4 c. cider vinegar
1 tbsp. sugar
1/4 tsp. salt
ground pepper to taste
1 large diced peeled cucumber
1 chopped plum tomato
1/2 c. diced green pepper
1/2 c. sweet onion

Whisk together vinegar, sugar, salt and pepper in a nonreactive bowl. Add cucumber, tomato, green pepper and onion. Toss; cover and refrigerate at least 1 hour or up to 2 days.