Filet Mignon with Red Wine Sauce

Mix together the rosemary, ½ teaspoon salt, and pepper on a sheet of wax paper; rub on both sides of the steaks.

Heat 1 teaspoon of the oil in a large skillet over medium-high heat. Add the steaks and cook until an instant-read thermometer inserted into the side of the steak registers 145 degrees F for medium, about 5 minutes per side. Transfer the steaks to a plate; keep warm.

Meanwhile, to make the sauce, heat the remaining 1 teaspoon oil in the same skillet over medium-high heat. Add the shallots and garlic and cook, stirring occasionally, until softened, about 3 minutes. Stir in the flour; cook 1 minute. Whisk in the wine, broth, mustard, and the remaining ¼ teaspoon salt; bring to a boil. Cook, whisking constantly, until the sauce begins to thicken, 3 to 4 minutes. Remove from the heat; swirl in the butter. Serve the steaks with the sauce.