Preheat oven to 350 degrees F.
In skillet, saute onion and celery in butter 3 minutes.
Add beef and salt and cook, stirring occasionally, another 5 minutes. Drain of extra fat.
Spread half the cabbage in 2-quart baking dish and cover with half the apples and all the meat mixture.
Add remaining cabbage and apple slices.
Cover and bake 1 hour.
Nice with mashed potatoes or noodles. Sprinkling Parmesan cheese on top, or grated cheddar, is also good, as is adding a clove of garlic in with the onion.
