Hi Paula! Here is a recipe taken from the cookbook "Oregon Trail Days - Eddyville, Iowa"- this is a cookbook that I've never found a recipe I didn't like!
ZUCCHINI RELISH (by Vicky Osterloh)
10 cups zucchini (peeled & ground)
4 cups onions (ground)
5 Tbs.salt
2 1/4 cups vinegar
2 1/2 cups sugar
1 tsp. nutmeg
1 tsp. dry mustard
1 tsp. tumeric
2 tsp. celery seed
2 Tbsp. cornstarch
1 red pepper (chopped fine)
1 green pepper (chopped fine)

Combine zucchini, onions, and salt. Let stand overnight. Drain, and rinse in cold water; drain again. Combine with remaining ingredients. Cook for 30 minutes after mixture comes to a boil. Pour in hot sterilized jars and seal.
Makes 7 pints.