Ingredients
Caramelized Onions
- 1 tablespoon oil
- 4 large white onions, finely sliced
- 1 tablespoon balsamic vinegar
- 1 tablespoon brown sugar
- 1/2 teaspoon salt
Beef Burgers
- 1 pound low-fat ground beef
- 1 teaspoon salt
- 1 teaspoon pepper
- 1 tablespoon oil
- 7 ounces Gruyere, sliced
- 4 brioche burger buns, halved and toasted
- 4 tbsp mayonnaise
- 1 tbsp balsamic vinegar
Steps
Caramelized Onions
- Place a large saucepan over low heat. Add oil and the onions. Cover with a lid and let cook for approximately 20 minutes or until soft but not colored, stirring often.
- Remove the lid then add the vinegar, sugar and salt and allow to cook for another 10 minutes or until caramelized and golden brown.
- Set aside to cool.
Beef Burgers
- Place the ground beef in a large bowl then season and mix well. Form one-fourth of the mixture into a ball, then flatten.
- Place 1 tablespoon of the onions in the center of the patty, then encase with the surrounding beef to create a stuffed burger.
- Leave in the fridge for 1 hour to firm up.
- Heat a frying pan over medium heat and add 1 tablespoon oil.
- Cook burgers for 3 to 4 minutes on each side until cooked through.
- Place a few slices of Gruyere on each burger and place the lid on the pan to melt the cheese.
- Chop the remaining caramelized onions and add to a bowl with the mayonnaise and balsamic vinegar and mix well to combine.
- Spread the bottom of each bun with one-fourth of the mayonnaise mix and top with a burger. Serve right away.