Zucchini Relish with Sweet Peppers

1 . Stage

Toss zucchini, onion, red bell pepper, and yellow bell pepper with kosher salt in a large bowl. Allow vegetables to rest for 8 hours; rinse and drain vegetables thoroughly.

2 . Stage

Heat vegetables, sugar, cider vinegar, cornstarch, celery seed, and turmeric over medium heat until thickened, about 50 minutes.

3 . Stage

Sterilize the jars and lids in boiling water for at least 5 minutes. Pack the zucchini mixture into the hot, sterilized jars, filling the jars to within 1/4 inch of the top. Run a knife or a thin spatula around the insides of the jars after they have been filled to remove any air bubbles. Wipe the rims of the jars with a moist paper towel to remove any food residue. Top with lids, and screw on rings.

4 . Stage

Place a rack in the bottom of a large stockpot and fill halfway with water. Bring to a boil over high heat, then carefully lower the jars into the pot using a holder. Leave a 2-inch space between the jars. Pour in more boiling water if necessary until the water level is at least 1 inch above the tops of the jars. Bring the water to a full boil, cover the pot, and process for 30 minutes.

5 . Stage

Remove the jars from the stockpot and place onto a cloth-covered or wood surface, several inches apart, until cool. Once cool, press the top of each lid with a finger, ensuring that the seal is tight (lid does not move up or down at all).