Steps
1. Peel and dice the cucumber.
2. Mash the ripe avocado in a bowl.
3. Finely chop the red onion and add it to the avocado.
4. Mix in olive oil, lemon juice, salt, and pepper.
5. Add the diced cucumber and toss gently to coat.
6. Garnish with fresh herbs if desired.
7. Serve chilled.