Lasagna in a sandwich maker
Why not; it can be a fun project.
It will need a lot of experimentation to make it work and it will not be a lasagna.
I'd completely cook the noodles, spread them on the sandwich maker, put a little bit of sauce and cheese in the middle, put another layer of noodles on top and press it down.
Depending on the size of your sandwich maker, you could even try multiple layers.
But it will be a kind of a pizza pocket.