Zucchini Pizza Pie

Ingredients

• about 1 1/2 lb. zucchini (4 c.)
• 1 c. each: shredded Mozzarella and sharp Cheddar cheese
• 2 eggs, slightly beaten
• 1/4 tsp. each: salt and garlic salt
• 1 lb. lean ground beef
• 1 medium sized onion, chopped
• 1/3 c. grated Parmesan cheese
• 1 (8 oz.) can tomato sauce
• 2 tsp. oregano leaves or spice
• 1 green pepper, seeded and cut in thin slices
• 1/4 lb. mushrooms, sliced or chopped
• 1 red pepper, seeded, and cut in thin slices