Preheat oven to 400 degrees F. Brush both side of potato slices with butter; place them on an ungreased cookie sheet. Bake in the oven for 30 to 40 minutes or until lightly browned on both sides, turning once. When potatoes are ready, top with bacon and cheese and continue baking until the cheese has melted.
Some recipes require just a little stock, and the leftovers from a whole can won't keep forever in the refrigerator. Freezing unused stock or a homemade batch in 1-cup muffin tins makes it easy to store in small amounts. Pop frozen portions out of tin; store them in resealable plastic bags labeled with the date (frozen stock keeps for about two months).