You're right, its a jowl and not pork cheeks, there actually is a slight distinction.
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This aint a picture of what I got, but what I got looks pretty much identical to this.
Definitely gonna be fatty as fuck.
Part of me almost says you ought to make carnitas out of them. Cube it up, add your citrus, cinnamon, allspice, garlic, Bay leaf, oregano, cummin, chili powder, etc.
Braise it for a bit, and then toss into a ripping hot cast iron skillet to Brown, or maybe an air fryer. Only problem is it might end up being real stringy and I'm not typically good with that type of text her if things like beef gets cooked too long, or pulled pork gets too stringy.
The muscle fibers make it look like beef flank steak, so I wonder if you could also just marinate it in something good and toss it on the grill, cooked to medium we'll, and then then slice against the grain. Hit it with a Jacquard, and maybe throw some Asian pear or pineapple juice in the marinade with bunch of soy sauce and what have you.
Other option is if you could try to butterfly them out just a bit, they would probably work as a porchetta. I mean that because all of the muscle fibers are running long ways and you're going to slice your porketta perpendicular so you get these really nice slices that you would with a rouladen if you were using beef flank steak for that. Fresh herbs, toasted and ground fennel seeds, garlic, salt and pepper, lemon zest and a bit of olive oil. Better butchers twine when you get a roll it back, and that would probably work pretty well. You can always Bart it with a little bit of bacon if you wanted to, or take a little bit of Italian sausage uncased and stuff it in the middle and roll around that.
I don't know but I think you got a lot of options. Whatever you end up doing just let us know how it turns out. I'll have to see if I can find some, because it's not something I've ever used, and it would be fun to try to make something good out of it.