Easy Steak Sauce with Seared Hanger Steak

Name: Easy Steak Sauce with Seared Hanger Steak
Ingredients: 3 tablespoons vegetable oil, divided; 1 medium onion, chopped; 4 garlic cloves, chopped; 1 Fresno chile or red jalapeño, seeded, chopped; Kosher salt, freshly ground pepper; 1 freshly ground pepper; 1 tablespoon tomato paste; 1/2 cup Worcestershire sauce; 1/2 cup red wine vinegar; 1/4 cup (packed) dark brown sugar; 2 tablespoons whole grain mustard; Few dashes of hot sauce; 1 1/2 pounds hanger steak, center membrane removed, cut into 4 pieces