Summer Squash Casserole

Ingredients : 4 zucchini chopped 2 onions chopped 1 (10.75 ounce) can condensed cream of mushroom soup ½ cup sour cream 3 medium carrots grated 1 (5.5 ounce) package croutons ½ cup butter 8 ounces shredded mozzarella cheese Methods : Preheat oven to 350 degrees F (175 degrees C). Boil...