Season the boiling water

• Fill a large stockpot with the water and bring to a boil.
• Add the salt, half of the Cajun seasoning, the Old Bay seasoning, the onion and the garlic.
• Squeeze in the juice of one lemon and drop the halves into the pot.

Boil the potatoes and sausage

• Add the baby potatoes and cook until almost tender.
• Add the smoked sausage rounds and continue cooking.

Cook the corn and crab

• Add the corn on the cob pieces and cook for a few minutes.
• Add the king crab legs and simmer until heated through.

Cook the shrimp

• Add the shrimp and cook just until pink and opaque.
• Drain everything in a colander.

Make the garlic butter sauce

• Melt the butter in a saucepan over low heat.
• Stir in the remaining Cajun seasoning and the paprika.
• Squeeze in the juice of the second lemon and whisk well.

Serve

• Spread the drained seafood and vegetables on a large tray or platter.
• Pour the garlic butter sauce over everything and toss to coat.
• Serve immediately with lemon wedges.