Ingredients for 12 servings:
1. 1/4 cup olive oil
2. 6 onions, medium, sliced thinly
3. 1 pinch sea salt
4. 1 tablespoon balsamic vinegar
5. 1/4 cup port wine
6. 1 sprig fresh thyme
7. 1/2 cup muscovado sugar
8. 1 teaspoon mustard seeds
9. 1/2 teaspoon red pepper flakes
10. 1/4 cup tomatoes, finely chopped

Directions:
1. Heat oil in heavy frying pan, then add onions & saute untils slightly brown.
2. Season with salt, then reduce heat & continue to cook, stirring constantly, until caramelized & tender.
3. Add rest of ingredients EXCEPT the tomato, & cook on low heat for 30 minutes, stirring occasionally.
4. Add tomato & cook 15 more minutes.
5. Remove from heat & let cool.
6. Store in a jar in the refrigerator for up to 2 weeks.