To Cook Shrimp: In a large bowl, Whisk the garlic, olive oil, salt, black pepper, and cayenne pepper. Add shrimp to the bowl, and stir until evenly coated. Preheat grill (or pan) for medium heat. Thread shrimp onto skewers. Cook shrimp on preheated grill for 2 to 3 minutes per side or until pink.
To assemble the salad: Place 2 cups of mixed greens in a salad plate, top with fresh-cut mango and cherry tomatoes. Place half the shrimp mixture on the salad and grate fresh parmesan on salad (optional). Lastly, drizzle with the fresh lime vinaigrette just before serving. Repeat for the other plate (this recipe makes two salads).
To make Lime vinaigrette: Add the olive, fresh lime juice, Dijon mustard, garlic powder, black pepper, and salt to a jar. Close the lid and shake until combine. Pour over salad just before serving.