Once your wife is comfortable with these you can move onto the good stuff (brains, kidneys, liver, sweetbread, tripe, etc). I'll see if I can find some detailed recipes for you in the next day or so.
Headcheese is another good gateway and old school on the stove is the way to go. SV headcheese is very hard due to the size of the skull. You need the skull for the gelatine. Once your headcheese is set cut it into cubes, double crumb and fry it - everything is good fried.
I find rillettes are best made with duck confit and duck fat. Pigs heads are not fatty enough by themselves. If I'm going to make a pork rillette I would used belly/butt.
Puffed chicken feet are worth the effort, SV 12hrs at 90C with 20% water. Bone with sharp knife and tweezers while still warm (the bones are very small and you need to get them all - 2-3 min average per foot to start, after 20 you will get quicker). Dehydrate in 240F oven for ~3hrs. Fry in hot oil until puffed and enjoy.
If you are interested in exploring the offal path, some good books are:
I also cooked goat brains SV and posted the results in a discussion somewhere on this site as well.