1/2 head cabbage, shredded, salted, and rinsed
2 red bell peppers, thinly sliced
2 green bell peppers, thinly sliced
3/4 cup apple cider vinegar
1 tablespoon mustard seed
1 teaspoon celery seed
1 cup sugar
Toss the cabbage and peppers and place into a strainer resting over a bowl to drain for 2 hours. Then place into a mason jar.
In a small saucepan, bring the vinegar, sugar, mustard seed, and celery seed to a boil. Pour over the cabbage and the peppers. Store in the refrigerator for 3 days before serving.