This recipe gets the award for best recipe of the year so far. I didn't have mushrooms, and they're not my favorite anyway so I added extra spinach. Instead of avocado slices, I made guacamole so I had the flavors of jalapeno and cilantro (plus it spread nicely. I also cut them into 4ths instead of 3rds because it's easier to eat that way. These are hard to stop eating, so if you think this serves 4...think again. Recipe courtesy of Cookie and Kate.