Boil the potatoes and corn

• Bring a large pot of salted water to a rolling boil.
• Add the potatoes and cook until just tender.
• Add the corn and cook until bright and tender, then lift both out and set aside.

Cook the sausage and crab

• Add the sausage to the boiling water and cook through.
• Add the crab legs and cook until heated through and shells turn bright red.
• Remove the sausage and crab and keep warm with the potatoes and corn.

Boil the shrimp

• Add the shrimp to the same boiling water.
• Cook just until pink and opaque, then drain everything well.

Make the garlic butter sauce

• Melt the butter in a saucepan over low heat.
• Add the garlic and cook until fragrant, without browning.
• Stir in the Old Bay, Cajun seasoning, smoked paprika, brown sugar, hot sauce and the juice of the lemons.
• Simmer gently until the sauce is glossy and well combined.

Toss and serve

• Combine the drained seafood, sausage, potatoes and corn in a large pot or serving tray.
• Pour the garlic butter sauce over everything and toss to coat generously.
• Scatter over the parsley and serve with lemon wedges.