I can’t tell you exactly how many times I’ve looked for a vegetarian option at a taco stand and ended up with mushroom tacos. I’m talking half-moon sliced crimini mushroom tacos: They rarely hit the spot. What you can do, though, is buy yourself a nice pound of oyster mushrooms and change how you think about mushroom tacos forever. This crispy mushroom taco recipe sets out to prove that all mushroom tacos are not created equal. The best mushroom tacos start with crispy pulled bits.