Use a mandolin to thinley slice the potatoes, and put them in cold water until ready to use.

In a medium pot melt butter, then add bacon.

Add onions and garlic, cook for 5 minutes or tell onions are translucent.

Add heavy cream, salt, pepper and wisk on low tell sauce becomes thick and boiling.

Reduce heat and add the cheese.

Put potatoes in a lightly greased casserole dish

Pour sauce over potatoes, bake for an hour at 350° uncovered.