Penne Gratin with Sausage, Fennel, and Mushrooms

Penne Gratin with Sausage, Fennel, and Mushrooms is a warm and delicious pasta casserole that is both filling and easy to assemble. This Italian sausage pasta recipe uses both sweet and hot sausage for a great balanced flavor. The fennel throughout the casserole echoes the flavors in the sausage. Mushrooms help make this dish hearty, while rich cream and cheese make it decadent. This amazing pasta bake is simple to put together, but tastes like it took all afternoon.