Whenever there are Portabella’s that are in the Costco, I always pick up a pack. They are usually super cheap and you can use them as a meat all in itself or fill them with tasty foods. I did a double whammy and made a Primal Portabella Burger! Whhhaaaaattttt??? I know right!  This is a super filling and healthy burger option than your trusty buns and not as messy as having...