01 -
Set oven to 375°F (190°C) and allow to preheat.
02 -
Place sliced sweet potatoes in a large pot with salted water, bring to a boil, and simmer until tender, approximately 10–15 minutes. Drain thoroughly.
03 -
Arrange half of the drained sweet potatoes in an even layer in a greased baking dish.
04 -
Distribute half of the cranberries over the sweet potatoes.
05 -
In a mixing bowl, combine heavy cream, brown sugar, cinnamon, salt, and black pepper. Whisk until fully blended.
06 -
Evenly pour half of the seasoned cream mixture over the first layer in the baking dish.
07 -
Layer the remaining sweet potatoes and cranberries, then cover with the rest of the cream mixture.
08 -
Sprinkle the top layer evenly with shredded Gruyère cheese followed by breadcrumbs.
09 -
Bake uncovered for 30–35 minutes, or until the surface is golden brown and bubbling.