Pat the shrimp dry with paper towels and season lightly with a pinch of the salt and pepper.
Heat 0.5 teaspoon of olive oil in a non-stick skillet over medium-high heat.
Add the shrimp to the pan and cook for 2-3 minutes per side until pink, opaque, and slightly curled.
In a small bowl, whisk together the remaining 1 teaspoon of olive oil, lemon juice, chopped parsley, chopped dill, and the remaining salt and pepper to create the dressing.
Dice the avocado and slice the cucumber into half-moons.
In a large mixing bowl, combine the cooked shrimp, avocado, and cucumber.
Drizzle the lemon-herb dressing over the shrimp mixture and toss gently to coat without mashing the avocado.
Place the mixed greens in a serving bowl and top with the dressed shrimp and avocado mixture.