Combine cabbage and salt; let stand for 1 hour.

Bring sugar, vinegar, water, celery seed and mustard seed to a boil. Boil for 1 minute. Cool.

Add carrot, green pepper and vinegar mix to the cabbage & salt. Stir to combine. Put in freezer bags or jars. Freezes up to 2 months.

Remove from the freezer a couple of hours before eating.