On a mandolin slicer, slice potatoes to a medium thickness, rinse and cover with water, bring to a boil. Cook 3 min turn off
Slice half of a medium onion to the same thickness, add to potatoes in pan. Let sit 2-4 min
Cook bacon and chop. Drain potatoes and onions place in bowl, add 3 Tbs flour and cornmeal, toss to cover, add chopped bacon. Set aside.
Drain pan bacon was cooked in, and add 3 Tbs butter, melt and add 3 Tbs flour, stir till it just starts to thicken, add both milks, stir till smooth, remove from heat, add cheese a little at a time, stir till smooth.
Pour potatoes, onions and bacon in a baking dish, pour milk and cheese mixture over and bake at 350 for 25 min loosely covered, then remove cover and bake an additional 15-20 min or till potatoes are tender and top is starting to brown. Enjoy!!!!!