Preheat oven to 400°.
Combine the rice, 1/4 cup Parmesan cheese, 1/4 teaspoon salt, fines herbes, and egg whites. Press mixture into an 11 x 7-inch baking dish coated with cooking spray. Sprinkle fontina evenly over rice mixture. Set aside.
Cook broccoli in boiling water for 4 minutes or until tender; drain well.
Heat a large nonstick skillet over medium heat. Coat pan with cooking spray. Add onion; cook 4 minutes or until tender, stirring occasionally. Stir in broccoli. Spoon broccoli mixture evenly over rice mixture. Top with shredded cheddar cheese.
Combine egg substitute, milk, remaining 1/2 teaspoon salt, and pepper in a small bowl; stir well with a whisk. Pour egg mixture over broccoli mixture.
Place bread in a food processor; pulse 10 times or until coarse crumbs measure 1 1/4 cups. Combine breadcrumbs and the remaining 2 tablespoons Parmesan cheese. Sprinkle breadcrumb mixture evenly over broccoli. Bake at 400° for 23 minutes or until set.