I made this mid-week.
It's a caramelized 3 mushroom (Crimini, Shitake and Button) along with a caramelized onion.
The sauce is a Porcini and Black Tuffle sauce base
Grated Asiago, Parmesan and Fontina Cheese and Gruyere for the layers
Baked at 350 for 30 minutes covered.