First, you need a big portabella cap...scoop off the top dark layer, but save it to use in the "stuffing".
Then, take some chopped spinach, the scooped out mushroom stuff, a bit of chopped tomato, and saute it all in some olive oil. I added some Spike seasoning and some dried oregano and basil for a bit of flavor.
Take this mix and put it in the mushroom cap (after brushing the mushroom cap with some olive oil (very lightly). Then, top it with some shredded mozzarella (or parmesan) cheese and bake at 350...until the cheese melts.
Dig in with a fork or eat it like a slice of pizza! It was SO yummy! Just a little juicy as mushrooms release water when cooked and also probably due to the tomatoes. Healthy, filling, and super easy. Give it a try!