Tacos al Pastor

Soak pasilla chiles and guajillo chiles in a bowl with hot water until softened, about 10 minutes; drain. Mash chiles, garlic, achiote powder, cumin, and cloves in a saucepan with a fork.

Add vinegar to saucepan and bring to a boil; cook and stir until mixture becomes a thick paste. Season with salt. Rub chile paste over sliced pork, stacking meat on a plate. Cover and marinate in the refrigerator for 8 hours to overnight.

Heat a large skillet over medium-high heat. Add marinated pork and pineapple; cook and stir until pork is browned, 7 to 10 minutes. Divide pork mixture over stacks of two corn tortillas; serve with onion, cilantro, and lime wedges.