Make sure you cook the lasagne noodles really well so they can't absorb too much more of the moisture.
Also, try soaking the potatoes in water for a day or so before you cook them. That'll leach out a lot of the starch which is what will make it gluggy.
Most lasagne is actually better after it's been baked, cooled and reheated. Maybe this one will be the same.
What do you need comfort food for? Is something bad going on? I hope it all works out ok, whatever it is.
