Rigatoni pasticciati is a hearty and filling pasta pie with pastry from Trentino Alto-Adige in Northern Italy. It’s made with rigatoni, meat ragu, sautéed mushrooms and grated cheese all inside a shortcrust pastry case. A fabulous way to use up leftover ragu or Bolognese! I came across this rigatoni pasticciati in a cookbook of recipes…