Scalloped Sweet Potatoes With Thyme

"For a subtle twist on tradition, these Scalloped Sweet Potatoes actually blend one pound of sweet potatoes and one pound of russets. So the result is a mostly savory, creamy side—with a richer flavor and a touch of sweetness. To cut way down on prep time, we used a food processor outfitted with the thinnest slicing disk to slice the potatoes. Spread those slices out in a baking dish with garlic, thyme, salt, and pepper, then submerge the mixture in heavy cream. The half-and-half potatoes soak up the cream as they bake in the oven for nearly an hour. No cheese necessary...."