Preheat the oven to 350F/177C.

Gather all your ingredients, cream, butter, garlic, potatoes, salt and pepper. Make sure to wash your potatoes.

Now we will mix the cream, salt, minced garlic and butter together. [Do not be alarmed if the butter gets a little chunky in the cold cream] It all melts anyway.

Now for the tedious part of the recipe if you don't have a Mandoline. You are going to peel all your potatoes and then slice them really thinly.

Time to prepare the cheese. Grate your 2.5 cups of gruyère cheese now!

Now you are going to lay a 3rd of your sliced potatoes at the bottom of the baking dish, followed by the heavy cream mix then followed by the cheese. - Repeat these steps 2 more time until all the ingredients are used up.

After repeating all the steps 3 times, you will be ready to cover with cheese and pepper at the top. Then cover in foil. Not too tight, so the cheese doesn't stick to it.

Place it in the oven for 1 hour and 30 minutes. Remove the foil at the end and make sure the potatoes are soft by piercing a knife through. It should come out easily.

Now broil the top for 5-10 minutes.

You are done!!! Your potatoes should be soft and the cheese should be broiled on top! [It will look a little more crusty than mine because I have a bottom broiler!] But just as delicious.