Grilled Pork Tacos al Pastor
1 cup boiling water, or as needed to cover 1 large jalapeno pepper, thinly sliced - or t… 1 pinch cayenne pepper, or to taste 1 pinch dried oregano, or to taste 1 pinch ground cumin, or to taste 1 tablespoon vegetable oil, or as needed 1 tablespoon white vinegar 1 teaspoon ground cinnamon 1 teaspoon ground dried chipotle pepper 1 teaspoon vegetable oil 16 (6 inch) corn tortillas 16 slices Monterey Jack cheese, divided 2 cups shredded cabbage, divided 2 dried pasilla chiles, seeds discarded 2 pork tenderloins, membranes (silver skin) r… 3 dried guajillo chilies, seeds discarded 4 cloves garlic ½ cup roasted tomato salsa, divided ½ teaspoon salt, or to taste ¾ cup pineapple juice