I've Fallen in LOVE with This Potato Gratin Recipe!

What's the Secret to Making the FLUFFIEST Potato Gratin Ever?
An incredibly delicious recipe for cooking potatoes! The perfect meal after a busy week.
/ @cook_simply_easily I will be very grateful if you subscribe to my channel, put a like. It will help me a lot in the development of my channel!
Ingredients:
Potatoes - 1 kg.
Pepper - 2 pcs.
Onion - 1 pc.
Garlic - 6 cloves
Mushrooms - 150 g.
Cream - 100 g.
Salt, ground black pepper, paprika.
Mozzarella cheese - 200 g.
Vegetable oil