2 lemons, halved (plus more for serving)
½ cup seafood boil (such as Zatarain’s Crawfish, Shrimp and Crab Boil) or Old Bay Seasoning
- 8 cloves garlic, roughly chopped
- 1 large onion, quartered
- 6 sprigs fresh thyme
- 1 pound small red potatoes, halved
- 14 ounce Andouille or smoked sausage, cut into 1-inch pieces
- 4 ears corn, husked and cut into thirds
1½ pounds shrimp, shell on, deveined
- 2 Tablespoons unsalted butter