Bring a large pan of water to the boil, add salt, make the water as salty as the sea! Add spaghetti and cook till al dente
In a separate pan melt the butter over a low heat, sweat the chilli and garlic, add the crab meat, heat slightly then remove from the heat
Spoon 1 ladle of pasta water into the crab pan, add the crème fraiche, lemon juice and zest and stir to combine
Drain the spaghetti and add to the crab mix, stir through, plate and finish with chives