Maybe that's the way forward for you Li Li?
Chinese grocery store and deli... I'd love to have (more) delis here, with some fried noodle foods etc... that way you wouldn't have to worry about creating elaborate menus, but you could cook a few different dishes for sale for the day...
And if you include some US/UK candy and sodas.. you'd have all the expat foodies flocking in... (thou I don't know how many there are in Lahti region..).