How in the world do you get sliced mushrooms to taste like bacon? You toss them with tamari or soy sauce and vitamin E-rich grapeseed oil, then you roast the seasoned mushrooms at high heat until browned and crisp around the edges. These shiitakes taste intensely savory and add an appealing texture to the tacos. (Fun fact: Shiitakes contain many of the same amino acids as meat).
In the recipe, we suggest making gluten- and dairy-free pancakes from a mix and using those in place of tortillas. But if you're more into the real deal, go ahead and use actual tortillas — just make sure they're made from organic heirloom corn, or at the very least buy them from your local Mexican grocer.