Salads - Cucumber and Tomato Salad with Avocado

Cucumber and Tomato Salad with Avocado

- 2 cups diced tomatoes- 2 cups diced cucumbers- 2 cups lettuce- 2 avocados, peeled and diced- 1 tablespoon plain yogurt- 1/4 cup chopped cilantro- 1 diced onion- 2 tablespoons olive oil- 2 tablespoons lemon juice- Salt and pepper to taste