In small bowl, combine rice, egg and cheddar cheese. Press into well greased 12-inch pizza pan. Bake at 200 degrees for 5 to 10 minutes, or until crust is lightly golden.
In another small bowl, combine tomato sauce, Italian seasoning, garlic powder and black pepper; spread over crust. Sprinkle with Parmesan cheese.
Layer 1/2 the mozzarella cheese, mushrooms, zucchini, olives and red pepper. Top with remaining mozzarella cheese and parsley. Bake 8 to 10 minutes longer or until vegetables are tender crisp and cheese is melted.