Bring a medium pot of salted water to a boil.
Add the raw shrimp to the boiling water and cook for 2-3 minutes, or until they turn pink and opaque.
Drain the cooked shrimp in a colander and rinse under cold water to stop the cooking process.
In a mixing bowl, combine the olive oil, lemon juice, Dijon mustard, salt, and pepper. Whisk until well combined to create the dressing.
In a large mixing bowl, combine the salad greens, cherry tomatoes, cucumber, red onion, and avocado.
Add the cooked shrimp to the vegetable mixture and drizzle the dressing over the top.
Toss gently using tongs or a slotted spoon until everything is well coated.
Serve the salad topped with chopped fresh parsley for garnish.