Spent the most part of Easter afternoon at the in-laws. My mother-in-law usually prepares most of the food and I always seem to contribute a form of potatoes. Wanting a change of they pace from the usual mashed potatoes, I made what I think is the best potato gratin I've ever tasted. It's very rich and will likely only be made for special occassions due to its high fat content, but it is so delicous. (Forgive me, I totally forgot to take a picture. It was that good!)
I followed the entire recipe except I used Russest potatoes instead of Yukon Gold (a 5 pound bag of Russet potatoes was on sale) and substituted regular pototoes for the yams. I'll definitely make this again with a few tweaks like adding more Guyere, herbs, and garlic. I'd also increase the covered and uncovered cooking times to 45 minutes each.
Enjoy!
Scalloped Yukon Gold and Sweet Potato Gratin with Fresh Herbs
Bon Appetit, November 2008
1 1/2 pounds medium Yukon Gold potatoes
1 1/2 pounds medium red-skinned sweet potatoes (yams)
2 cups heavy whipping cream
1/4 cup (1/2 stick) butter
2 garlic cloves, minced
1 tablespoon minced fresh Italian parsley
1 tablespoon minced fresh rosemary
1 tablespoon minced fresh sage
1 tablespoon minced fresh thyme
1 1/2 teaspoons fine sea salt
3/4 teaspoon freshly ground black pepper
1 1/4 cups (packed) coarsely grated Gruyére cheese (about 5 ounces)
Fill large bowl with cold water. Working with 1 Yukon Gold potato at a time, peel, then cut into 1/8-inch-thick rounds and place in bowl with water. Repeat with sweet potatoes. Combine cream, butter, and garlic in medium saucepan; bring to simmer. Remove from heat. Mix all herbs in small bowl. Mix sea salt and black pepper in another small bowl.
Butter 13x9x2-inch glass baking dish. Drain potatoes, then pat dry with kitchen towels. Transfer half of potatoes to prepared baking dish. Use hands to distribute and spread evenly. Sprinkle with half of salt-pepper mixture, then half of herb mixture. Sprinkle with half of cheese. Repeat with remaining potatoes, salt-pepper mixture, herb mixture, and cheese. Pour cream mixture over gratin, pressing lightly to submerge potato mixture as much as possible. DO AHEAD: Can be made 6 hours ahead. Cover with plastic wrap and chill. Remove plastic wrap before baking.
Preheat oven to 400°F. Cover gratin tightly with foil. Bake 30 minutes. Uncover; bake until top of gratin is golden and most of liquid is absorbed, about 25 minutes longer. Let stand 10 minutes; serve.