Prepare the Ingredients : Dice the cucumber and avocado, halve the cherry tomatoes, and thinly slice the red onion. Chop the fresh parsley.

Combine in a Bowl : In a large mixing bowl, combine the cucumber, cherry tomatoes, avocado, red onion, and chopped parsley.

Make the Dressing : In a small bowl, whisk together the olive oil and red wine vinegar (or lemon juice) with a pinch of salt and pepper.

Toss the Salad : Drizzle the dressing over the salad components in the mixing bowl. Carefully mix everything together until the dressing is well distributed, ensuring each ingredient is beautifully coated.

Serve Fresh : Serve immediately for the best texture and flavor. This salad is perfect on its own or as a side dish to grilled meats, sandwiches, or pasta.