I thawed the 2 racks for about 2 days, cut them in half, and put in a crock pot (bone side down) with about a 1/4 cup of ACV and a similar amount of water for moisture.
6-ish hours on low.
Pull the bones out, and rough chop the rest.
The meat was still firm - no mush.
Easy peasy!
Those containers pictured are from KFC. I think they serve mashed potatoes in them for the kids meals. (they came from my wife's old school) Roughly 4oz each - a nice sized sandwich.