1: Prepare the Vegetables
First, chop the green tomatoes, cabbage, peppers, and onions into small, even pieces.
Then, place all chopped vegetables in a large mixing bowl. Sprinkle with salt, mix well, and allow them to sit overnight to draw out excess moisture.
2: Drain and Rinse
The next day, drain any excess liquid from the vegetables. Afterward, rinse thoroughly under cold water, and pat them dry to remove any remaining moisture.
3: Cook the Chow Chow
In a big pot, mix together the vegetables, vinegar, sugar, mustard seeds, and celery seeds. Stir to mix thoroughly.
Bring the mixture to a boil. After reaching a boil, reduce the heat to a simmer for about 30 minutes, stirring occasionally. The relish should soften and absorb the flavors as it cooks.
4: Canning and Storing
While the mixture is still warm, gently spoon the chow chow into sterilized jars, leaving around 1/2 inch of headspace at the top. Seal jars tightly with lids.
For a longer shelf life, process jars in a water bath for 10 minutes. If you’re unfamiliar with canning, refer to this Guide to Canning Vegetables for step-by-step instructions.
Store jars in a cool, dark place. Once opened, refrigerate the chow chow for optimal freshness.