Easy Steak with Pan Sauce

Name: Easy Steak with Pan Sauce
Ingredients: 1–1½ pounds steak (sirloin, boneless ribeye, or NY strip); Kosher salt; Freshly ground black pepper; 1 tablespoon vegetable oil; 1 small shallot; 2 garlic cloves; ¼ cup (½ stick) cold unsalted butter; 2 sprigs thyme; 2 tablespoons Dijon mustard; 2 teaspoons Worcestershire sauce