Grilled Steaks with Red Chile Sauce

Name: Grilled Steaks with Red Chile Sauce
Ingredients: 3 oz dried guajillo chiles guajillo chiles; 4 cups boiling-hot water; 1 (12-oz) jar roasted red peppers, drained, seeded, and coarsely chopped; 3 garlic cloves, minced; 1 teaspoon cumin seeds, toasted and ground in an electric coffee/spice grinder; 1 tablespoon chopped fresh oregano or 3/4 teaspoon dried, crumbled; 1 teaspoon salt, or to taste; 2 tablespoons unsalted butter; 1 tablespoon all-purpose flour; 1 teaspoon cider vinegar, or to taste; 6 (3/4-inch-thick) boneless rib-eye steaks (7 to 8 oz each); Accompaniment: pickled red onions with cilantro