On a clean flat surface place 1 slice of pork, sprinkle with a little salt, top a slice of cheese and some chopped spinach, roll meat up and secure with a toothpick or two. Continue till all meat is rolled. In a small plate add flour, dredge roll-ups in the flour one at a time . In a medium to large frying pan add olive oil, over low-medium heat, heat until oil is hot but not sizzling add roll-ups. Cook covered on medium heat for 5 minutes (or until browned) turn the roll-ups over and repeat cooking covered for 5 minutes. Add white wine raise heat and cook covered till thickened, approximately another 5 – 10 minutes. Serve immediately. Enjoy!