Begin by boiling water in a pot.
Add the shrimp and cook for 2-3 minutes until they turn pink.
Drain and rinse the shrimp under cold water to stop cooking.
In a large bowl, combine the salad greens and cherry tomatoes.
Add the sliced cucumber and red onion to the bowl.
Gently fold in the diced avocado and cooked shrimp.
In a small bowl, whisk together olive oil and lemon juice.
Season the dressing with salt and pepper to taste.
Drizzle the dressing over the salad and toss gently to combine.
Garnish with fresh herbs, if desired, and serve immediately.