Cook the Brussels sprouts and potatoes in the broth for 8-10 minutes until al dente. Drain and mix gently with the smoked pork and sausages in a buttered casserole dish. Salt, pepper and season with plenty of nutmeg. Pour the hollandaise sauce over it and cover the pan with aluminum foil. Place in the oven at 200 ° for a good 30 minutes.
Remove the foil, sprinkle the cheese over the casserole and bake for another 15 minutes at 225 °.