2 1/2 pounds sweet potatoes, peeled and thinly sliced
2 cups shredded Gruyere cheese (or Swiss)
4 cloves garlic, minced
2 teaspoons fresh thyme, chopped (plus more for garnish)
1 1/2 teaspoons Kosher salt
1/2 teaspoon black pepper
1 teaspoon smoky paprika
2 cups heavy whipping cream
Preheat oven to 400 degrees. Grease a 9-by-13-inch baking dish. Arrange sweet potato slices in four rows in baking dish; top with shredded cheese. Mix remaining ingredients; pour over potatoes in dish. Cover with foil and bake 35 minutes. Remove foil; return to oven and bake an additional 30 minutes, until top is browned and potatoes are tender. Garnish with thyme and serve.

