Steps
1. Cut the avocado in half, remove the pit, and scoop the flesh into a bowl.
2. Mash the avocado lightly with a fork, leaving some chunks for texture.
3. Add the diced tomato, cucumber, and red onion to the bowl.
4. Drizzle with olive oil and lemon juice, then season with salt and pepper.
5. Gently mix everything together until well combined.
6. Garnish with fresh cilantro if desired, and serve immediately.