Tacos aren’t something Mom makes on Wednesday night with the help of the Old El Paso Express Kit. They don’t come covered in pre-shredded four-cheese blends and they don’t crunch when you bite down. The taco is a union of warm crushed corn, savory filling, and spice-charged condiment. They are soft and drippy and four-bites big, a love letter waiting for you on every street corner in Mexico. Few fillings escape the tortilla’s grasp: rosy char-grilled chunks of carne asada, crispy curls of fried pork skin, spicy tangles of roasted peppers and cooked cream, squishy mounds of slow-simmered eyeballs. But no tortilla has ever known a better friend than the spit-carved, chile-rubbed pork at the heart of the al pastor taco, perhaps Mexico’s most heroic hand-held food.