Prepare the eggplant by cutting into thin (1/4 in or about 1 cm thick) long wise. Peel. It is much easier to peel after it has been cut. All you do is lay each piece flat side down and run the knife along the edges! Saute each piece in a bit of olive oil until easily pierced with a fork. Set aside to cool. This can be done the day before, it takes a while to cook fully.
Saute the chopped mushrooms, onion, bell peppers, and the veggie crumbles until tender. Set aside.
Meanwhile, boil and drain your pasta, set aside.
Mix spinach and tofutti cream vegan cheese (room temperature) together until creamy. You may have to microwave it for a few seconds to soften. You can also add a dab of vegan margarine and some salt.
Assembly: Coat bottom of large baking pan with spaghetti sauce. Layer 3-4 noodles, then some mushroom-pepper mixture, then a few slices of eggplant, then some spinach mix, top with spaghetti sauce. Repeat. Make sure you have noodles on top. Cover liberally with more spaghetti sauce (you won't use the whole jar). Cook at 350 degrees for about 30 min or until sauce on top is thick.