Papas Fritas with Santa Fe–Style Chile Sauce

Name: Papas Fritas with Santa Fe–Style Chile Sauce
Ingredients: 16 guajillo chiles, stemmed, seeded and halved; 8 ancho chiles, stemmed, seeded and halved; 4 dried chiles de arbol, stemmed and seeded; 1 cup (4 oz./125 g) coarsely chopped white onion; 2 garlic cloves; 1 Tbs. red wine vinegar; 1 tsp. dried oregano, preferably Mexican; Kosher salt; 4 1/2 lb. (2.25 kg) medium red potatoes, scrubbed but unpeeled; Kosher salt and freshly ground pepper; 1/2 cup (4 fl. oz./125 ml) clarified butter or canola oil; 2 tsp. sweet paprika; 1 1/2 cups (6 oz./185 g) shredded Monterey jack cheese; 2/3 cup (5 1/2 oz./170 g) sour cream, at room temperature; 4 green onions, white and pale green parts, thinly sliced, for serving