I love these on top of burgers! Put some goat cheese on top of the burger, and the onions on top of that and it's pure heaven!
1 red onion
1/4 cup balsamic vinegar
2 tbls of brown sugar
Slice a red onion and put in a pan with some olive oil. Cook on medium heat stirring often until soft. Add 1/4 cup of balsamic vinegar and 2 tbl of brown sugar. Cook an additional 10 mins on medium heat stirring often. Enjoy!