Description
Tender sliced beef and deeply caramelized onions come together in one skillet with garlic, thyme, broth, and balsamic for a rich and comforting dinner that feels special but stays simple.
Ingredients
Scale
- 1 1/4 pounds top sirloin steak, thinly sliced against the grain
- 2 large yellow onions, thinly sliced
- 2 tablespoons olive oil
- 1 tablespoon unsalted butter
- 3 cloves garlic, minced
- 1 teaspoon fresh thyme leaves
- 1/2 cup low-sodium beef broth
- 1 tablespoon balsamic vinegar
- 1 teaspoon kosher salt, divided
- 1/2 teaspoon black pepper
- 1 tablespoon chopped parsley, optional
Instructions
- Preheat a large skillet over medium heat.
- In a small bowl, stir together the beef broth, balsamic vinegar, thyme, 1/2 teaspoon of the salt, and the black pepper.
- Add 1 tablespoon olive oil and the butter to the skillet. Add the sliced onions and the remaining 1/2 teaspoon salt. Cook for 22 to 25 minutes, stirring often, until the onions are very soft and deeply golden. Add the garlic during the last 1 minute. Transfer the onions to a plate.
- Increase the heat to medium-high. Add the remaining 1 tablespoon olive oil to the skillet, then add the sliced beef in a single layer as much as possible. Sear for 1 to 2 minutes per side until browned at the edges and just cooked through.
- Return the caramelized onions to the skillet and pour in the broth mixture. Stir for 1 to 2 minutes, scraping up any browned bits, until the sauce lightly reduces and coats the beef and onions.
- Turn off the heat and let the dish rest for 2 minutes. Sprinkle with chopped parsley if using.
- Serve hot with mashed potatoes, rice, cauliflower mash, or roasted vegetables.
Notes
- Slice the beef while it is slightly chilled for thinner, cleaner cuts.
- If the onions start to dry out, add a spoonful of water to help them soften without burning.
- Cook the beef in batches if needed so it sears instead of steams.
- Use certified gluten-free broth if needed to keep the dish fully gluten free.
Nutrition
- Serving Size: 1 plated portion
- Calories: 390
- Sugar: 7g
- Sodium: 520mg
- Fat: 23g
- Saturated Fat: 7g
- Unsaturated Fat: 14g
- Trans Fat: 0g
- Carbohydrates: 11g
- Fiber: 2g
- Protein: 34g
- Cholesterol: 95mg
Keywords: sliced beef caramelized onion, beef skillet dinner, sirloin with onions, easy beef and onion recipe