Peel the potatoes and cut them into slices. Cut the bacon into large thin slices. Finely crush the garlic and cut the onion into thin rings. Begin to stack an oiled layer, then fries, bacon, a little crushed garlic and onion rings, repeat until you run out of products.
Between the rows, sprinkle some seasoning to taste. Beat the cream lightly with mustard and fresh milk, add a little salt and pepper.