Good-Cooking - Icy Spicy Shrimp

Ingredients

• 2 quarts water
• 3 tablespoons salt
• 2 teaspoons cayenne pepper, or to taste up to 2 tablespoons
• 1 small red onion , thinly sliced
• 1 tablespoon coriander seed
• 1 tablespoon mustard seed
• 1 teaspoon celery seed
• 1 tablespoon dried red chile pepper flakes
• 5 whole cloves
• 5 allspice berries
• 3 bay leaves
• 2 lemons, cut in half
• 3 cloves garlic, finely chopped
• 1 (2-inch) piece fresh gingerroot , finely chopped
• 2 pounds fresh shrimp
• 2 tablespoons fresh basil, chopped