Zucchini Pizza Casserole

4 c shredded unpeeled zucchini
1/2 tsp salt
2 eggs
1/2 c grated Parmesan cheese
3 c shredded cheese (mozzarella & cheddar are a great pick!)
1 lb ground beef
1 can (15 oz) tomato sauce
Optional:

     green pepper, chopped
     chopped onion
     diced tomato

Place zucchini in strainer and sprinkle with salt. Let stand for 10 minutes, then squeeze out moisture. Combine the zucchini with eggs, Parmesan and half of the shredded cheese. Press into greased 9x13 baking dish. Bake, uncovered, at 400 degrees for 20 minutes. Meanwhile, cook beef and onion until meat is no longer pink and  drain the grease. Add the tomato sauce to the beef and spoon over zucchini mixture. Top with remaining shredded cheese, green pepper, and tomato. Bake 20 minutes longer or until heated through.