Cook pasta according to directions to al dente; drain.
Meanwhile, heat Alfredo sauce over low heat or in the microwave on reduced power.
Do not overheat!
Cook or steam spinach to wilt; drain and pat dry.
Combine drained pasta with Parmesan and egg.
Press into bottom and up sides of oil-sprayed DEEP DISH 9” pie plate to form crust.
Spread cottage cheese over crust.
Spread spinach evenly.
Spread Alfredo sauce; and place tomato slices over sauce; sprinkle tomatoes with Italian seasoning and salt and pepper. Cover loosely with foil and bake in preheated oven at 375 degrees F.; for 25 minutes.
Uncover, and sprinkle with Mozzarella; bake for about 8 minutes to melt cheese.
Let set for 10 minutes before slicing into wedges.