Fry bacon in heavy skillet until crisp. Remove to warm plate. Pour off all but 1 Tbs. bacon fat.
Peel and coarsely grate potatoes, place in paper towel and squeeze out excess moisture.
Whisk together milk, egg, flour and salt; fold grated potatoes into batter.
Heat pan to medium high. Using a 1/3 cup measuring cup, transfer batter to pan. Flatten each pancake to 3" diameter. Fry a few minutes on each side until golden.
Transfer to platter in a warm oven until all are ready.
Serve with the bacon and lingonberries, if available!