Preheat oven to 350°F/180°C
In a frying pan, sauté the onions in butter until caramelized. Place onions in the bowl with cream cheese, cottage cheese, mozzarella, egg, herbs and salt and pepper. Mix together until combined.
If using scallops, sauté them in butter for a few minutes until cooked.
In a separate bowl mix together mushroom soup, milk, white wine and seafood.
Place a layer of oven ready lasagna noodles in a 9x13 lasagna pan. Spread ½ the cottage cheese mixture over the lasagna noodles. Spoon ½ the seafood mixture over the cottage cheese mixture. Add another layer of noodles and repeat.
Sprinkle with parmesan cheese, cover with foil and place in pre-heated oven for 45 minutes. Remove foil, sprinkle with cheddar cheese and cook for about 10 minutes until it melts and starts to bubble. Let stand for 15 minutes before slicing to allow to set.