How about having this at Halloween? As slices or as a whole, this makes a lovely gift! You can also freeze it for later!
I have a recipe like this from about 15 years ago that you make in a pot, so I altered a bit so that it can be made in an oven.
You can skip the tart crust. In that case, wrap the pan with foil so that the kabocha squash filling doesn't leak outIf the tart crust starts to get sticky while you are pressing it with your hands, don't use your finger tips, but press with your thumb pad.
Enjoy Japanese food around the world.