Mom's Pork Sausage Fondue

I can still see my Mom checking this in the oven before a party. Brings back memories of fall, home and of course my Mom. Still a big hit today!!!

2 pounds breakfast pork sausage

1 large onion, sliced in rings

1 pound brown sugar

3 apples, sliced and cored

Preheat oven to 250 degrees.  Cut sausage into thirds.  Put in a 9x13 inch pan.  Layer onions and apples on top and sprinkle brown sugar over all.  Bake for 2 1/2 to 3 hours.  Baste sausage with juice while cooking.  Add a small amount of water if needed.  Cover with aluminum foil during the last 1/2 hour.  Serve warm in fondue or crock-pot.  Better if made the day ahead.