Balsamic Tomato & Onion Jam Recipe (with Video)

1. Cook the red onions in the olive oil in a large pot over high heat until they begin to caramelize
2. Add 2 tbsp of water and continue cooking until they begin to brown again
3. Repeat the previous step, continuing to add water as the onions brown, until they are completely soft and caramelized, about 15 mins
4. Add the tomatoes, sugars, vinegar, spices, and salt to the pot
5. Bring the mixture to a boil and continue cooking until the mixture is jammy, about 1 hour
6. Cool completely
7. Jam keeps in an airtight container in the fridge for up to 2 weeks