- To a large stockpot filled with 1 gallon water, add celery, garlic, Old Bay, peppercorns, salt, bay leaf, and lemon juice. Bring to a simmer and let cook 5 minutes.
- Add potatoes and cook for 2 minutes, then add corn, shallots, and sausage. Let simmer for 5 minutes. Add crab and cook 3 minutes. Add shrimp and cook until pink, about 2 to 3 minutes, depending on size.
- Drain and serve with melted butter, cocktail sauce, sea salt, lemon wedges, and espelette or extra Old Bay.