Preheat oven to 400F. Coat a 9 inch pie pan ( or a 2 qt baking dish) with cooking spray. Use a vegetable spiralizer or julienne pepper to cut zucchini into long thin noodles/*
Place zucchini noodles in a colander and sprinkle with salt, tossing to incorporate the salt. Let zucchini stand for 15-20 min. in colander (to release water).
Meanwhile, cook sausage in a large fry pan. set aside.
Once zucchini has rested for 15 min., use paper towels or tea towel to gently dry and release any additional water. Set aside.
In a large bowl combine eggs, ½ cup mozzarella cheese, Parmesan cheese, flour, and cornmeal. Add zucchini noodles and stir to incorporate. Transfer to prepared pie pan. Bake for approx. 15 mins. until set and no excess liquid remains.
Remove from oven and spread with pizza sauce. Top with remaining mozzarella cheese, sausage, mushrooms, bell pepper and olives. Bake 15-20 mins more until cheese is melted, bubbly and turning light brown. Remove from oven, let rest for 2-3 mins and serve. Garnish with fresh chopped basil if desired.