Saute slices smoked brisket. Boil the pasta in boiling salted water drained them and while they are still warm mix them with the butter. Distribute them in 4 pots. In the middle of the spaghetti carefully put 1 egg yolk, and around 2 slices of smoked breasts. Serve sprinkled with grated cheese and bake for 2-3 minutes in a hot oven.