55g blue cheese (such as Roquefort or Gorgonzola), cut up
Handful fresh rocket
Cook the pasta according to the packet instructions.
Meanwhile, toast the walnut pieces in a non-stick pan over a high heat for 1-2 minutes, tossing occasionally. Add the low-fat crème fraîche. When it bubbles, stir in the blue cheese and heat until just melted. Remove from the heat, toss with the pasta and rocket, and season to taste.