I use the Marie Callendar's copykat crust recipe and I used 1/2 Extra Sharp Cheddar and 1/2 Cabot's Seriously Sharp Hunter's Cheese (WalMart carries this)
Very very delicious! Found decades ago from a B & B but never tried till today!
Make double pie crust, or purchase 2 and bake one and cool.
Spread mustard on baked crust, covering bottom and sides. Arrange tomatoes on top of mustard and cover with a layer of cheese. Sprinkle with salt and pepper.** Repeat process to make 2 or 3 layers, ending with cheese on top. Spread mayonnaise on top of cheese (good luck). Sprinkle parmesan over mayonnaise. Place second pie crust over mixture and seal edges with a fork; cut slits in crust for ventilation.
Baked 350 degrees 30 minutes, or till top crust is lightly browned. If necessary, cover edges of crust with foil near the end of the baking time if they get too brown.