3 to 3.5 lbs zucchini or yellow squash, sliced to 1/4-inch discs
4 to 4.5 lbs yellow onions, thinly sliced
1/2 c. kosher salt
1/2 c. sugar
2 c. white distilled vinegar
2 c. cider vinegar
2 tsp mustard seeds
1 3/4 tsp celery seeds
1 3/4 tsp ground turmeric
1 packet dry pectin