Cut tops of peppers or tomatoes; reserve. Scoop out centers. Dissolve 1 cup salt in 4 quarts cold water; pour over vegetable shells and tops; let stand 24 hours in a cool place. Drain; rinse and drain thoroughly. Combine cabbage, 1 tsp. Salt and pepper and mustard seed; press into shells. Replace tops and fasten with toothpicks or sew with coarse thread. Pack into hot Ball jars, leaving 1/8 inch head space. Combine vinegar, water and sugar.
Bring to boiling and pour boiling hot, over peppers, leaving 1/8 inch head space. Adjust caps. Process 15 minutes in boiling water bath.
