Pork Scaloppine with Lemons

Scaloppine are pieces of meat that have been pounded very thin. You're probably familiar with veal scaloppine, which are used to make dishes like veal marsala and veal parmesan. Veal scaloppine can be hard to find, however, and they're usually pricey. That's why this dish calls for pork scaloppine, which you can make yourself.

(serves two adults and two children)

1 large pork tenderloin (about 1 lb)
2 large lemons
¼ c flour
3 Tbs canola oil
kosher salt
freshly ground black pepper
2 Tbs unsalted butt...