asparagus with crab chilli shallot butter

Ingredients

• 100g salted butter, softened
• 1 dressed crab, white and brown meat separated
• 2 shallots, finely chopped
• Handful parsley, finely chopped
• 1 red chilli, finely chopped
• ¼ tsp paprika
• 1 unwaxed lemon
• 2 bunches of asparagus, trimmed
• Olive oil, for brushing
• Snipped chives, to serve
• Flaky salt, to serve