Louisiana Crawfish Dressing

6 cups sliced squash (2 pounds)
2 cups water
1 large onion, chopped
1 green bell pepper, chopped
1 cup chopped celery
1 clove garlic, minced
1/2 cup butter or margarine, melted
1 egg, slightly beaten
1 cup Italian-seasoned breadcrumbs
1/3 cup grated Parmesan cheese
1 teaspoon Beau Monde