This is an inexpensive, hearty, and satisfying meal. Made with ingredients that are most always on hand, this casserole is the perfect meal solution on nights you just don't feel like going to the grocery store. I sometimes add frozen peas and some diced, cooked carrots to the mixture before baking, to make this a delicious 'all in one' dinner. The buttery crumb topping provides a nice, crunchy contrast to the creamy filling. Enjoy !!