and adding a little of the reserved pasta water to make a silky sauce. Remove from the heat and stir in the crème fraîche and lemon zest. Spoon the pasta into bowls, top with the grated cheese ...
While the fish is cooking, make the sauce. Put the egg yolk and lemon juice in a small lidded jar. Shake well, until emulsified. Melt the butter in a small pot, then pour into the jar. Cover ...
Stir in the mascarpone and butter. Add the kale, and lemon zest and juice to taste ... about 3 to 5 minutes. Transfer the pasta to the sauce, finish with Parmesan, and toss to coat.