Turn on the broiler, and put the rack close to heat. Mash 1 garlic clove and a few minced Thai chiles with 1 teaspoon salt until it forms a paste. Add to it 1 teaspoon sugar, 1 tablespoon fish sauce, 2 tablespoons lime juice and a little black pepper. Rub paste all over 1 1/2 pounds peeled shrimp. Broil, 2 to 3 minutes per side. Garnish: Cilantro and mint.