Raspberry Slaw

1 small box raspberry jello
1 cup boiling water
1 tablespoon vinegar
1 cup shredded cabbage
1/4 cup chopped celery
2 tablespoons chopped green bell pepper
1 tablespoon grated onion

Dissolve jello in hot water. Add cold water and vinegar. When slightly thickened, fold in remaining ingredients. Pour into mold or 8-inch pan until firm.