Cook the pasta following pack
instructions, scooping out a bit of the
cooking water as it cooks. Three mins
before the pasta is done, add the broccoli
to the pan and cook for the 3 mins more.
Drain, then tip back into the pan.
Reduce the heat to very low and gently
stir through the prawns, crème fraîche,
lemon juice and some seasoning. Add
a splash of the reserved pasta water
if it looks too thick, then serve when
everything is really hot.