Here's the recipe:
3 tbls butter
1/2 onion, chopped
1 rib celery, chopped
4 sage leaves, minced
salt & pepper
1 lb sausage
Add 1 tbls butter to a skillet.
Add celery and onions, cook until golden brown. Add sausage and sage leaves and cook until brown. Season with salt and pepper.
Let sausage mixture cool and strain excess fat into bowl.
With a melon baller (or knife) hollow out the apples and fill with sausage.
Pour in maple syrup (vary amount to preferred level of sweetness)
Top off apples with butter.
Set up charcoal grill for indirect grilling (arrange coals to one side and place aluminum foil on opposite side of the grill)
Place apples on foil and baste with the remaining fat.
Cover for 20-30 minutes.