Place the shrimp in a colander and rinse with cold water. Line a large plate or tray with paper towels and place the shrimp on the towels. Pat dry with additional paper towels. Set aside next to the stove.
Melt the butter in a large skillet over medium-high heat. Add the garlic and red pepper flakes and cook until fragrant, about 30 seconds. Add the shrimp to the pan and sprinkle with salt and pepper. Cook for about 2 minutes. Flip and cook for 1-2 minutes on the other side.
Remove from the heat and drizzle with lemon juice. Take care not to overcook the shrimp. Transfer the cooked shrimp to a plate and set aside.
Salad Instructions
In a large bowl, combine the lettuce greens, spring mix, parsley, cucumber, tomatoes, bell pepper, and carrot. Drizzle lightly with the vinaigrette and toss well to coat.
Transfer to serving bowls and top with avocado slices, shrimp, and cheese crumbles. Serve with additional dressing, as desired.