Grilled Crawfish or Lobster with Garlic Butter

• 2 live lobsters or crawfish, each weighing 600g
• 100 g softened unsalted butter

If you are serving the shellfish with mayonnaise, make it as usual and stir in crème fraîche and a little lemon juice.

Heat the overhead grill. Mix the butter with the garlic and parsley and a little salt and pepper. Split the live lobsters or crawfish in half lengthwise with a very large, sharp knife, starting at the middle of the head shell. Remove the intestinal veins. Crack t