Preheat oven to 350.
Slice off the tops of the sub rolls. Then scoop out the bread from the inside. Spoon some spaghetti sauce into the rolls.
In a mixing bowl, combine the sour cream, egg white, spices, salt and 1 cup of the mozzarella cheese. Spoon over the spaghetti sauce.
Sprinkle a little Parmesan cheese and mozzarella cheese over top. Add the bread top back on. Place into a foil pouch and bake for 25-30 minutes.
Prepare small, simple side salad.
Serve Lasagna Buns with side salad.