Clean, wash and cut broccoli into small florets. Peel the stalk and cut into small cubes. Peel and finely dice the onion. Heat the oil in a pan, crisp up the bacon and take it out.
Fry the diced onions in hot bacon fat. Deglaze with stock and cream, bring to the boil, add broccoli. Simmer covered for 4-5 minutes. Cook pasta in boiling salted water according to package instructions (approx. 11 minutes).
Stir the blue cheese with a wooden spoon into the sauce (for cambozola, remove the rind first) and melt it while stirring. Stir the sauce thickener and 2/3 of the bacon into the sauce, bring to the boil again briefly.
Season the sauce with pepper and possibly a little salt. Drain the pasta and let it drain. Arrange noodles with sauce on plates. Sprinkle with remaining bacon.