Pan-Seared Steaks with Balsamic Onions
Caramelized onions dress up a simple pan-seared steak, and they don't need to cook for a long, long time. Balsamic vinegar helps to brown the onions and enhances the flavor of a four-minute pan sauce.
Gather Your Ingredients
Before You Begin
The cooking times here yield medium-rare steaks. Because the sauce is so rich, we think three steaks (the maximum you can fit comfortably in a large skillet) will feed four people when sliced thin.
Instructions
1.
Heat 2 tablespoons oil in large skillet over medium heat until shimmering. Add onions and 1/2 teaspoon salt and cook, stirring frequently, until lightly browned, about 10 minutes. Transfer onions to bowl. Wipe out skillet with paper towels.
2.
Add remaining 1 tablespoon oil to skillet and cook over medium-high heat until just smoking. Meanwhile, pat steaks dry with paper towels and season with salt and pepper. Cook steaks, without moving, until browned on first side, 4 to 5 minutes. Flip steaks and continue to cook until browned on second side, 3 to 4 minutes more. Transfer steaks to plate and wrap with foil.
3.
Discard fat in skillet, return onions to pan, and set over medium heat. Add garlic and cook until fragrant, about 30 seconds. Add 1/2 cup vinegar, rosemary, and brown sugar and cook, scraping up browned bits with wooden spoon, until thick and syrupy, about 2 minutes. Pour any accumulated steak juices into pan along with remaining 1 tablespoon vinegar. Season with salt and pepper.
4.
Slice steaks crosswise into 1/4-inch slices and transfer to platter. Spoon onions and sauce over steak. Serve.
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