First, bring a large pot of water to the boil. Add your pasta and cook for 10-12 minutes until al dente.
Put a wide based pan on a medium heat. Add your pancetta and cook for 1 minutes, then add the onion. Cook for another 3 minutes until the pancetta is golden.
Cut the broccoli into 2cm chunks and add to the pan. Cook for 2 more minutes.
Add a dash of water to the pan, then stir in the crème fraiche and dolcelatte. Turn the heat down to low and cook gently, stirring often for 5 more minutes.
When the pasta is cooked, drain and retain 1 mugful of the pasta water. Toss the pasta with the sauce and enough water to make it mix together nicely.
Serve immediately, topped with black pepper and Parmesan.