butter in a large stockpot. Saute onions
in butter until soft and translucent. Add mirin and continue to cook until it is almost reduced. Stir in crab boil seasoning and 1 tablespoon pepper. Continue to cook approximately 1 minute. Pour in fish stock and clam broth and bring to a boil. Add the potatoes
and cook the potatoes until just tender. Continue to simmer
and add crab, lobster, scallops, and shrimp
. Return to a simmer and add fish. Gently poach
fish until just cooked. Add heated half-and-half. Season with salt and freshly ground black pepper, to taste. Enjoy!