Heat the oven to 450°F with a rack in the middle position. In a 12-inch cast-iron or other heavy skillet over medium-high, heat 1 tablespoon of oil until barely smoking. Add the chorizo and cook, stirring occasionally and breaking the meat into small bits, until well browned, about 5 minutes. Using a slotted spoon, transfer the chorizo to a paper towel–lined plate; set aside.

Add the jalapeños and scallions to the pan, then cook, stirring occasionally, until the vegetables are lightly charred, 3 to 5 minutes. Transfer to the plate with the chorizo; set aside.

Pour the remaining 2 tablespoons oil onto a rimmed baking sheet and brush to coat the entire surface. Place 2 tortillas on the baking sheet to coat the bottoms with oil, then flip them and coat the second sides.

Spread ¼ cup of the bean mixture evenly on half of each tortilla, all the way to the edges. Top the beans on each with ¼ of the cheese, then fold the unfilled half over to cover and press gently to seal. Transfer to a plate. Repeat with the remaining tortillas, beans and cheese.

Place the filled and folded tortillas in a single layer on the baking sheet. Bake until the cheese has melted and the bottoms of the tortillas are golden brown, about 10 minutes. Using a metal spatula, transfer the tlayudas to a wire rack and cool for 5 minutes.

Carefully open each and fill as desired with the chorizo-jalapeño-scallion mixture, lettuce, pickled onions, tomato and hot sauce. Re-fold, then cut into wedges. Serve warm.