In a large bowl, combine tomatoes, cucumber, green onion, yellow pepper, parsley, and basil.
In a small bowl, whisk together lemon juice, olive oil, salt, ground black pepper, and garlic. Pour lemon juice mixture over the tomato mixture, and toss to coat. Refrigerate for 30 minutes.
Meanwhile, preheat oven to 350 degrees F (175 degrees C). Place bread cubes in a single layer on a baking sheet. Bake for 12 minutes, or until toasted and dry.
