INSTRUCTIONS

1. Add cilantro, dill, and mint to the bowl of a food processor. Pulse, scraping down sides if needed, until very finely chopped. Add yogurt, mayonnaise, oil, lemon juice, garlic, and salt. Process until dressing is vibrant green and smooth, 1 to 2 minutes.
2. Spoon some dressing over the bottom of a large platter. Arrange tomatoes overtop. Slice cucumbers lengthwise in half, then cut on the bias into 1-inch pieces. Arrange with tomatoes. Season with salt and pepper. Drizzle over more dressing. Top with additional herbs. Serve immediately with remaining dressing.