Peel the butternut squash, cut into fine slices (2-3 mm thick). Peel the apple, cut into slightly thicker slices 0.5 cm thick. Mix the remaining ingredients. Swirl the pumpkin and apple slices in it.
Preheat the oven to 200 °.
Layer the whole thing in a casserole dish rubbed with butter. Bake for about 30 minutes at 200 °. If necessary turn it over so that everything cooks evenly.
Annotation:
I process the lower bulbous part of the butternut squash into soup, the upper (neck part) I use for this dessert, because it no longer contains any seeds, but is all the pulp that can be sliced so well.