Cook the pasta in salted water until al dente. In the meantime, cut the ham into small strips.
Put the cooked pasta in a baking dish. Add the ham and the hollandaise sauce and mix everything together. Sprinkle the cheese on top and place in the preheated oven.
Bake at 200 ° C for 15-20 minutes; when the cheese is firm, the casserole is ready.