Stir in sout cream, if desirered. Remove from heat. Fine dry bread crumbs 1. Remove cores and seeds from tomatoes. Saute onion in butter.
Stuff tomatoes with rice mixture.
Sprinkle bread crumbs on top. Plase in a shallow casserole or baking dish. Bake at 375F 20 minutes. Continue baking until tender. Combine oil, sugar, caraway seed, salt, and vinegar.