1/2 c. distilled white vinegar
3 c. unpeeled, 1/4-inch sliced and quartered cucumbers
2 c. chopped tomato (about 1 large)
1/2 c. chopped red onion
salt and pepper to taste

Combine all ingredients. Season to taste with salt and pepper. Mix well. Refrigerate, covered, at least 30 minutes before serving.