4 lbs green tomatoes, chopped (about 8 cups)

1/4 cup salt

1 tsp freshly ground pepper

1-1/2 tsp dry mustard

1-1/2 tsp cinnamon

1/2 tsp allspice

1-1/2 tsp cloves

1/4 cup mustard seed

1 quart cider vinegar

1 cup light-brown sugar

2 sweet red or green peppers, chopped

1 onion, chopped