This recipe comes from friend and fellow foodie Bergy at recipezazz.com, who found the recipe in Chatelaine, and it’s one of the 15 burgers they recommend.
This is something simple I threw together with some stuffing size mushrooms and a bit of manchego, smoked chorizo, and seasonings. You could easily make this with larger portobello mushrooms if you wish.
The appie comes together quickly and the result is spectacular. Scale the recipe if you need more- you could do quite a few recipes in the same oven.