Preheat oven to 350 F. Wash kale, shake dry and chop finely, stems included.
Heat butter and oil in a 10-inch cast iron frying pan. Once it sizzles, add kale, working in batches. As each batch wilts, push it to one side and add the next until all the kale is in the pan.
Cook for two to three minutes, maximum, then add garlic and toss. Pour cream over top and cook briefly, just until cream starts to thicken.
Transfer kale to an 8 x 8-inch baking dish, or just leave it in the pan. Sprinkle cheese over top, followed by breadcrumbs and Panko. Cover with tin foil.
Bake for 30 minutes. Uncover and bake for another 20 to 25 minutes, until the top is browned and the cream is bubbling through. Let sit for a few minutes before serving.