Preheat oven to 400F (204C).
Prepare a baking tray with parchment paper.
In a small bowl, mix the coconut amino and the Italian seasoning. Add salt and pepper to taste. Set aside.
Place the portobello mushrooms gills down on the prepared baking tray. Drizzle the coconut amino mixture, and bake for 5 minutes.
In the meantime, prepare a quick pizza sauce, mixing in a bowl the tomato sauce, garlic powder, onion powder, paprika, and half of the dried oregano.
Take the mushrooms out of the oven and drain them a little on a plate with a paper towel. Return them to the baking tray, gills up, and spoon pizza sauce into each portobello mushroom.
Top each mushroom with potato cheese, garnish with dried oregano and bake them for about 10 to 15 minutes.
Serve and enjoy!