Preheat oven to 400°F.
Place zucchini in colander, sprinkle with salt. Let stand 10 minutes and then squeeze out moisture.
Combine zucchini with egg, nutritional yeast and 1/2 cup cottage cheese.
Press mixture into a 9x13 baking dish coated with cooking spray.
Bake 20 minutes.
Meanwhile, in a large saucepan, add beef, onion, salt and pepper. Cook until meat is no longer pink and drain if necessary.
Stir tomato sauce into beef mixture and spoon over cooked zucchini.
Sprinkle with remaining cottage cheese, bell pepper and Italian seasoning.
Bake until heated through, about 20 minutes.