Preheat oven to 350°F. Spray a 9in. square glass baking dish with cooking spray or olive oil.Heat oil in a large pan over medium heat.Add the onion, and sauté for 3-4 minutes, or until translucent and starting to soften.Add the carrots and zucchini, and sauté for another 5-6 minutes, or until veggies are soft.Add the spinach, and cover with a lid for 6-8 minutes, stirring occasionally, or until the spinach is wilted.Place the veggies into a bowl and allow to cool slightly.Add the cottage cheese, cheddar cheese, ½ c parmesan cheese, egg whites, egg, and dry mustard, and mix until fully combined.In a bowl, combine the crust ingredients, and spread into the prepared baking dish.Spoon the veggie and cheese mixture on top, and spread evenly.Sprinkle the top with 2T parmesan cheese.Bake, uncovered, at 350°F for 30-35 minutes, or until it is cooked through, golden, and bubbly.