Note: We made the batch of jam shown here with grape tomatoes and left the skins on which helps give the jam some extra texture. If you use the plum tomatoes called for in the recipe, you should follow steps 1-4 in the recipe to remove the skin before chopping up the tomatoes.
- 4 pounds plum tomatoes, or other tomato varieties such as grape or cherry
- 1 cup chopped fresh basil
- 1 cup sweet onion such as Vidalia, chopped
- ½ cup brown sugar
- 1 ½ cups granulated sugar
- 1 teaspoon salt
- ½ teaspoon coriander
- ¼ teaspoon cumin
- 1/8 cup cider vinegar
- 1/8 cup balsamic vinegar
- Juice of one lemon
- Clean tomatoes, removing any stems. Cut an X in each tomato end with a sharp knife.
- Prepare an ice water bath.
- Bring four quarts of water to a boil in a non stick pot. Keep the heat on full and drop the tomatoes in. When the skin starts to peel, remove them to the ice bath. Empty the water, you will reuse the pot.
- Work over a sheet pan and peel the skins off the tomatoes. Then squeeze the stem end to pop out the stem. (It’s a squeeze, twist and pull motion to remove the stem. Depending on the variety of tomatoes, you may also need to squeeze out the seeds.) Roughly chop the tomatoes and place them back into the dry pot.
- Add all of the other ingredients to the chopped tomatoes. Bring to a boil then reduce heat to a simmer. Cook the mixture for about two to three hours or until it reduces to a thick jam. Make sure you don’t let it burn. The cooking time depends on the amount of liquid in the variety of tomatoes you use so the timing is not an exact science however the finished product will be about 4 cups (one quart).
- Store in 8 ounce glass canning jars (follow complete canning steps shown here) or store in your refrigerator for up to two weeks.