I'm pouring over real estate listings these days, and I came across this little house with a unique way to maximize their kitchen space: they put the fridge in the space under the stairs. If you go to the listing (https://www.realtor.ca/real-estate/24179204/14-vambola-avenue-udora) and click on "more photos", you can get the 3D interactive tour by Matterport - with that you can see that there's also a microwave tucked under the stairs, facing the breakfast bar, and space as well that allows for air circulation and ventilation.

I actually think this is a really well-designed house for the limited space.