Rosemary Garlic Burgers with Gruyere

Yields:
4
Prep Time:
10 mins
Total Time:
25 mins
Fact: Burgers are better with sweet-and-tangy onions glazed in balsamic vinegar.
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Ingredients
- 1 Tbsp. extra-virgin olive oil
- 1 large red onion, cut into half moons
- 1 Tbsp. brown sugar
- 1 Tbsp. balsamic vinegar
- 1/4 cup red wine
- kosher salt
- Freshly ground black pepper
- 1 1/4 lb. ground beef
- 1 Garlic clove, minced
- 1 Tbsp. finely chopped fresh rosemary
- 3 oz. Gruyere, thinly sliced
- 1/4 cup grainy Dijon mustard
- 4 potato hamburger buns (or other hamburger buns)
- Lettuce, for serving
- Tomato, for serving
Directions
- Step 1In a large sauté pan over medium-high heat, heat oil. Add onions and cook until beginning to soften, 4 minutes. Stir in brown sugar and balsamic vinegar and cook until beginning to caramelize, another 3 minutes. Add wine and let simmer until evaporated, 2 to 3 minutes, then season with salt and pepper.
- Step 2Preheat broiler to high.
- Step 3In a large bowl, combine ground beef, garlic, and rosemary and season generously with salt and pepper. Combine mixture thoroughly with your hands and shape into 4 patties. Season patties with salt and pepper on both sides.
- Step 4Heat a lightly oiled grill pan over high heat, cook for 3 minutes, then flip. Add Gruyere to the burgers and cook an additional 3 minutes. Transfer pan to broiler until cheese completely melts, 15 to 30 seconds.
- Step 5Spread bottom of each bun with 1 tablespoon Dijon mustard. Top with burgers, balsamic-glazed onions, and tops of buns, and serve with lettuce and tomato.
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