Spinach Salad with Spiced Shrimp and Mango

Name: Spinach Salad with Spiced Shrimp and Mango
Ingredients: 1/2 medium red onion, very thinly sliced (about 1 cup); 1/2 cup plus 1 tablespoon fresh lime juice (from about 8 limes); 8 ounces baby spinach; 1 large mango (about 1 pound); 10 ounces large shrimp, peeled and deveined, tails intact; 1 teaspoon coarse salt; Freshly ground pepper, to taste; 1/8 teaspoon cayenne pepper, or to taste; 1 tablespoon olive oil; 1 tablespoon minced garlic; 3 tablespoons coarsely chopped fresh cilantro leaves