With just a quick simple search: tomato jam, you can find TONS of recipes. Here’s the one that I liked best. It is from The New York Times. I also have some limes that are almost on their way out so that was helpful too.
1 ½ pounds good ripe tomatoes (Roma are best), cored and coarsely chopped
1 cup sugar
2 tablespoons freshly squeezed lime juice
1 tablespoon fresh grated or minced ginger
1 teaspoon ground cumin
¼ teaspoon ground cinnamon
⅛ teaspoon ground cloves
1 teaspoon salt
1 jalapeño or other peppers, stemmed, seeded and minced, or red pepper flakes or cayenne to taste
Combine all ingredients in a heavy medium saucepan, Bring to a boil over medium heat, stirring often.
- Reduce heat and simmer, stirring occasionally, until mixture has consistency of thick jam, about 1 hour 15 minutes. Taste and adjust seasoning, then cool and refrigerate until ready to use; this will keep at least a week.