INGREDIENTS
1 tablespoon salted butter
5 pounds sweet potatoes, peeled, and sliced in 2-inch rounds that are about ¼-inch thick.
2 teaspoons chipotle chile powder, divided
1 teaspoon kosher salt, divided
14 to 16 ounces shredded Gruyere cheese, divided
2 cups heavy cream
PREPARATION
Smear the...