There are recipes that seem made for days when you don’t feel like complicating life but don’t want to give up something tasty: the potato and onion gratin with milk is just one of those recipes. A couple of layers of thinly sliced potatoes and onions, a bit of sage, salt, pepper, and that half a liter of milk that, in the oven, does the magic. The potatoes remain soft (without becoming mushy) and are wrapped in a rustic and homemade flavor. A simple, economical, and very easy-to-make dish that always disappears too quickly: two bites and you’ll realize that half of the gratin is already gone!

Other potato recipes that may interest you:

Difficulty: Very Easy
Cost: Economical
Preparation time: 20 Minutes
Portions: 4 People
Cooking methods: Oven
Cuisine: Italian
Seasonality: All Seasons

Ingredients for Potato and Onion Gratin with Milk

1.75 lbs potatoes (weighed with skin)
5.3 oz golden onion (weight net of waste)
2 cups milk
A few leaves sage
butter
salt
black pepper

Tools

1 Potato Peeler
1 Mandoline
1 Baking Dish oven-safe
Aluminum Foil

Preparation of Potato and Onion Gratin with Milk

Peel the onion and slice it very thinly with a mandoline.
Peel the potatoes, wash them, pat them dry with kitchen paper, and slice them thinly again with the mandoline.
Grease an oven-safe baking dish with a bit of butter and arrange a first layer of potatoes on the bottom, slightly overlapping them. Then salt and pepper to taste.
Add half of the onion.
Cover with another layer of potatoes.
Then distribute the remaining onion, salt, and pepper to taste, and some sage leaves cut into strips.
Finally, pour all the milk into the baking dish and distribute some small knobs of butter here and there.
Cover with a sheet of aluminum foil and bake in a preheated static oven at 340°F for 15 minutes.
After the first 15 minutes, remove the foil and continue cooking for another 30 minutes + a few minutes on grill function until golden.
Take the potato and onion gratin with milk out of the oven and bring it to the table directly in the baking pan. Serve it hot. Enjoy! Paola
I would like to remind you that you can follow me on various social media to stay updated on the new recipes I publish. You can find me on Facebook (HERE), Twitter (HERE), Pinterest (HERE), Instagram (HERE) and also on Tik Tok (@zenzero_limone). Thank you ♥!