Leek and Buttermilk Scallop Potatoes

by katerina on October 25, 2012

Buttermilk Scallop Potatoes

A really good scallop potato recipe is a treat indeed. My favorite version involves cups and cups of whipping cream and many knobs of butter, so I only make it when there is company and I have a great excuse.

Potato and Leek Casserole

This version however is far more guilt free with the substitution of buttermilk and the omission of excess butter. The result is a gently tangy potato gratin with melted leeks between the folds of potatoes. Serve with a great stew or braise.

Print Recipe

Leek and Buttermilk Scallop Potatoes

(serves 6)

1 tablespoon olive oil
1 leek
1 teaspoon salt
2 1/2 cups buttermilk
fresh ground black pepper
1 cup grated gruyere cheese
4 large russet potatoes

Finely slice the leek into rounds and wash very thoroughly in cold water. Heat a medium skillet to medium low heat. Add the olive oil and the leek along with a pinch of salt. Sweat the leek and str until soft. Remove from heat and allow to cool.

Preheat the oven to 400F. Combine the salt, buttermilk, pepper and two thirds of the cheese in a large bowl. Wash the potatoes and peel them. Hold the potato in a bowl of cold water as you peel the rest so they don't turn black. Finely slice (I prefer a mandolin) the potatoes, and as you slide them add them to the bowl of buttermilk. Toss with the leeks and add into an oven safe casserole. Sprinkle remaining cheese on top and more fresh pepper.

Transfer to the oven and bake for one hour. Test with a toothpick, if you feel resistance when poking the potatoes continuing baking until quite soft (possibly another 30 minutes). Allow to cool for 15 minutes before slicing and serving.

Prep Time: 15 minutes | Cooking Time: 60 minutes | Total Time:70 minutes
Calories(approximate per serving): 315

{ 4 comments… read them below or add one }

Gem October 30, 2012 at 12:29 pm

We did this last night, following the recipe exactly (even to the white casserole in the picture!), and the flavors were superb. Wish I’d had another leek, though. However, the potatoes did not get as done as we had expected. Al denté is putting it mildly. There even was still some translucency in some of the potato slices. What do you suppose happened?
FYI: Used a Wolf convection oven. Perhaps should use the large oven instead of the small one? Try it with convection off? Switch to a different color casserole? Thoughts?


katerina October 30, 2012 at 3:58 pm

Wow, I am surprised! I suspect it is due to the thickness of the potatoes. I cut mine very very thin with a mandolin, but the thicker they are the longer they will take to cook. I will adjust the cooking time to suggest 60-90 minutes. You can always test by sticking a toothpick in, it should slide in easily if the potatoes are cooked and soft.

Also, you can make this ahead, it reheats quite well.


Sarah | Shine Food November 12, 2012 at 6:02 pm

Oh my, oh my! This sounds like heaven. This time of year I am an absolute sucker for potato gratins like this. If you think this would qualify as a one-pot meal (or have another recipe that fits the bill), I’d love for you to consider submitting it to this month’s Shine Supper Club!


Allyson June 30, 2013 at 10:29 pm

This is in my oven, smelling fantastic. Thanks for the recipe!


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