Red Onion-Garlic Preserve

2 lb red onion, vertically sliced
1/4c red wine vinegar
1 tbsp EVO oil
1 c dry red wine
1 tbsp dried herbes de Provence or thyme
2 tbsp brown sugar
1/2tsp kosher salt
1/4tsp black pepper
8 cloves garlic, halved

Combine onion and vinegar in a large bowl, and toss well. Heat oil in a large pot over medium-high heat, then add onion mixture. Cook 5 minutes, and stir occasionally. Stir in wine and remaining ingredients, then bring to a boil. Reduce heat. Simmer until liquid almost evaporates, stirring occasionally (about 1 1/2 hours). Increase heat to high. Cook 3 minutes stirring constantly.