Heat oven to 350. Spray a 9 x 13" casserole dish w/ cooking spray. In bowl, stir together soup, carrot, water chestnuts, yogurt, parmesan cheese and pepper. Stir in spinach. Pour mix into casserole dish. Use a spoon to make 4 indentations in middle of casserole. Break 1 egg into each indentation. Bake, covered 45 min, or until eggs are set.