Slice pork loin in 1/4 to 1/2 inch thick slices. Dip in flour and coat white. Heat pork grease in iron skillet. When hot, drop in meat, brown on both sides. When browned cover with lid and cook slow until tender and juicy. Remove meat to plate; add two rounded spoons of flour to cooking juice. Mix in thoroughly. Add milk, salt and pepper to taste and cook slowly, stirring until smooth. Serve hot.