Cook broccoli in boiling salted water for about 12 minutes. In the meantime, peel and finely dice the onion and grate the cheese. Heat the fat in a pot, fry the onions in it until transparent, dust them with flour, sweat them and deglaze with broth and cream.
Bring to the boil, season with salt and pepper, add cheese and stir in. Cook the pasta in boiling salted water for about 8 minutes. Drain broccoli. Drain noodles, rinse with cold water and drain.
Coarsely chop the almonds and roast them in a pan without fat. Mix the pasta and broccoli, place in an ovenproof dish, pour the sauce over it, sprinkle with the almonds and bake in a preheated oven (electric cooker: 200°C/ gas: level 3) for approx. 20 minutes.
Serve the casserole garnished with parsley as desired.