Tuna casserole for me also has some kind of crunchy crust topping which doesn't include cheese, but, I think you could do the same crumb crust with a bit of parmesan too. I am not sure I would mix that into the body of the casserole, but, cottage cheese/ricotta in the layered part (as for a traditional lasagne) would be fine.
I am wondering how often you make these two selections for your daughter because it seems to me that if you combine the two then you will also have to come up with something else or she may be fatigued eating the same combo casserole all the time.
