Cook penne; 4 mins before the end of cooking, throw in broccoli florets. Meanwhile, heat olive oil, add a handful chopped walnuts and fry gently for 1 min.
Drain the pasta, adding 4 tbsp cooking water to the walnuts. Return the pasta to the pan, add the walnuts and creamy blue cheese. Gently stir
on the heat, just to melt the cheese. Squeeze over lemon juice to serve.