I have to say that this is my new favorite condiment. I first had it on a burger in New Haven after I went to see a play with my friends. I wasn't sure what to expect but was too hungry to care. I order sliders with this onion jam and some other stuff on them and I was blown away by how great it tasted. So, I decided to try and make it myself. I think I have come up with a pretty good interpretation. My favorite way to have this is on a burger with bacon and blue cheese. It is freaking delicious. So get ready to jam out with this stuff! You won't be sorry.
Sweet Onion Jam
2 sweet onions, sliced (use a mandolin if you have one)
2 Tbs bacon grease
1 tsp kosher salt
1 tsp black pepper
2 bay leaves
1 tsp rosemary
1/2 C brown sugar
1/3 cup white wine (dry)
1/4 Cup balsamic vinegar
1/3 Cup red wine vinegar
Saute onions in bacon grease over low heat until soft and golden
Add salt, pepper and herb and continue to saute until herbs soften
Add remaining ingredients and simmer low until liquid has evaporated and mixture becomes thick and sticky. Be careful not to burn it - keep stirring, especially towards the end.
Remove bay leaves.
Let cool and store in clean jar in refrigerator.