Rinse shrimp with cold water. Drain and dry on paper towels. Cook garlic in butter until tender; do not brown. Add remaining ingredients and toss to coat. Scrape pan contents into a rimmed baking sheet and spread in a single layer. Preheat broiler with a rack 4 inches from the heat source. Broil shrimp, stirring once, until just opaque; cooking time will vary based on the size of the shrimp,6 to 10 minutes. Transfer to a platter, garnish with parsley, and serve with plenty of hot French bread for sopping up the sauce.