Fill a small saucepan with half a liter of water and bring it to a boil. As soon as the boil starts, we submerge the mushrooms. We cover, remove from heat and we let them hydrate During 4 hours. This is also how the water is infused with the flavor of the mushrooms, which we will use later.
Meanwhile, cook the noodles in a saucepan with plenty of salty water and following the manufacturer’s instructions. We cool them under the cold water tap to cut the cooking and we drain them well. We return them to the saucepan and, so that they do not stick together, we add a splash of oil and stir well. We cut the half chicken breast into thin strips. We booked both.
When the mushrooms are hydrated, We remove them from the water with the help of a slotted spoon and we pass the water through a cloth strainer to remove the impurities. Heat the tomato sauce and add the mushrooms together with the dried oregano and 225 ml of the soaking water (we reserve the rest for other preparations). Cook over medium heat for 10 minutes before adding the chicken and boiling one last time.
Add the sauce to the noodles, season and stir well. Spread on a previously buttered baking dish. Sprinkle with grated cheese and a few globs of butter and bake at 200ºC for 10 minutes. After this time we gratin until the surface is golden. We serve immediately.