Preheat oven to 425 degrees F.
Heat 2 tablespoons oil in a 10-inch heavy skillet over moderately high heat until hot but not smoking, then saute bread crumbs, garlic, sage, salt, and pepper, stirring, until crumbs are golden brown, 3 to 5 minutes.
Transfer crumbs to a bowl and clean skillet.
Pat pork dry. Heat remaining tablespoon oil in skillet over moderately high heat, then brown chops in batches, turning over once, about 4 minutes. Transfer chops to a baking pan and spread tops with mustard and then bread crumbs. Roast in middle of oven until meat is just cooked through, 5 to 7 minutes.
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