Makes about 3 pints
Recipe may be doubled; increase cooking time by 10-15 minutes
2 lb. green tomatoes, cored and chopped
1 lb. white or yellow onions, chopped
3/4 lb. sweet red peppers, cored and chopped
1/2 lb. tart cooking apples, such as Granny Smith, cored and chopped
6 garlic cloves, finely chopped
1 cup 5% acidic organic raw apple cider vinegar (or less, see note below)*
1 Tablespoon kosher or sea salt
4 jalapeno peppers, cored, seeded if desired, and finely chopped
2 Tablespoons chopped cilantro
1 teaspoon ground cumin (optional)
Combine the tomatoes, onions, peppers, apples, garlic, vinegar, and salt in a large, nonreactive pot and bring to a boil. Reduce the heat and simmer, uncovered, stirring occasionally, until thickened, about an hour.
Stir in the jalapenos, cilantro, and cumin and simmer for 5 more minutes. Carefully purée the mixture using a stick immersion blender (I can’t say enough good things about my KitchenAid hand blender; it’s one of the best things I’ve bought for the kitchen) or in a traditional counter top blender, in batches if necessary, until still somewhat chunky. Don’t over mix; you don’t want it smooth.
If canning, return the puréed relish to a boil, then ladle the hot mixture into hot jars, leaving 1/4-inch head space. Process 15 minutes in a waterbath canner. Store in a cool, dark place.
The 1 cup of apple cider vinegar called for is to ensure that this is safe for waterbath canning (green tomatoes are acidic, but the other vegetables lower the overall acidity—1 cup is plenty), but if you’re planning to store yours in the fridge—where it will keep for several weeks without processing—and are concerned it might be too much vinegar for your taste, you can safely decrease the amount of apple cider vinegar to 1/2 cup, or even less.