Yukon Gold And Sweet Potato Gratin - cooking recipe

Ingredients

6 tablespoons butter, divided
2 1/4 lbs yukon gold potatoes, rinsed
1 1/2 lbs red sweet potatoes, peeled
2 cups whole milk
1 garlic clove, pressed
1 tablespoon kosher salt
2 teaspoons fresh thyme leaves
1 teaspoon ground black pepper
1/8 teaspoon ground nutmeg
1 cup whipping cream

Preparation

Heat oven to 400 degrees.
Coat 13x9x2 inch baking dish with 2 tablespoons butter.
Thinly slice all potatoes.
Place overlapping in prepared dish.
Bring milk and next 5 ingredients to boil in saucepan, then pour over potatoes.
Dot with 2 Tbsp butter.
Cover with foil.
Bake until potatoes are tender and milk is almost absorbed, about 50 minutes.
Uncover potatoes, pour cream over, and dot with remaining 2 tablespoons butter.
Bake uncovered until top is golden brown in spots, about 25 minutes.
Cool slightly before serving.
Cover with foil.