PREPARATION:

1. Pour one bottle of beer into large bowl half-filled with ice; set aside.
2. Add remaining 2 bottles of beer, seafood boil seasoning, mustard seeds and red pepper flakes intp 1-gallon stockpot. Squeeze lemon juice into pot, add lemon quarters. Bring beer mixture to simmer over medium-high heat.
3. Add shrimp. Cover; remove from heat. Let sit 3 minutes to cook shrimp. Drain; transfer shrimp to bowl of chilled beer and ice cubes. When cool, remove shrimp from bowl; arrange on platter. Serve with Dipping Sauce.