You can any buy these ingredients from super market (any supermarket). Or any organic market.
Step 1 stir all of the ingredients into ball (spinach, egg, mushroom and parmesan)
Step 2: place all these ingredients into the mushroom.
Cook at 180 degrees for 30 minutes
From my experience this type of recipe is slimy and is very different to what I make.
I cant prepare a lot of foods but this one is a big difference from what I usally make.