Preheat oven to 170 degrees C.

Heat the sliced potatoes in the microwave with the maximum heat for 4 minutes.

In a saucepan, melt butter over medium heat. Add the onion and garlic, stir for about 1 minute.

Add the flour, and stir constantly for one minute. Stir in milk, cream, salt, chicken stock, nutmeg, and black pepper. Cook until the sauce has thickened.

Layer the potatoes into bottom of the prepared casserole dish (make it one layer). Top with the sauce, bacon, and cheese.

Make the second layer of Potatoes, top with sauce, bacon, and cheese. Repeat until all potatoes, sauce, bacon and cheese are used.

Bake in the oven for 45 minutes, or until the potatoes are cooked well.

Check the video, how did I make this recipe on my YouTube channel: https://youtu.be/w9mJUKYOPuI