This is what I started with -- 12 pounds of apples.
Peeling, coring and slicing seemed to take forever. They're soaking in a lemon juice and water mixture to keep them from browning.
The cooking process is really quite easy -- I just added a little water and boiled until the apples were fork-tender. I had to use two pots because they didn't all fit in one.
Here's what the apples look like while cooking.
After they're cooked, I processed half of the apples in my Cuisinart, and mashed half by hand (because I wanted a chunky sauce). Then I added sugar & spices.