4 medium tomatoes, chopped into 1/2-inch pieces (or 2 pints smaller tomatoes)
1 medium cucumber, seeded and chopped into 1/2-inch pieces
1/2 medium red onion, chopped into 1/2-inch pieces
1 Tbsp lemon zest
1/2 tsp salt
1/4 tsp black pepper

In a large bowl, toss together all ingredients. Allow to stand for at least 20 minutes.

Yield: 4 servings, 1 cup per serving