Zucchini Sweet Pickles

8 c. sliced zucchini
1 c. sliced onion
2 c. sugar
2 c. vinegar
1 tsp. celery seed
1 tsp. turmeric powder
1 1/2 tsp. mustard seed
1 tsp. prepared mustard

Slice vegetables and cover with ice or cold water and 1/4 cup salt. Let stand 1 hour. Drain well. Bring syrup to boil. Pour over sliced zucchini and onion. Let stand 2 hours. Cook 5 minutes. Put in jars and seal.