This is definitely comfort food. I use a lot of mashed potatoes because that is the way my family likes it. Be sure to put the casserole dish on a cookie sheet when putting it in the oven to catch the drippings from going all over your oven. Prep time is approximate which includes frying the beef and making the mashed potatoes. I cheat and use Instant Garlic Mashed Potatoes. You could make 2 small casseroles and freeze one before baking, when ready to cook frozen casserole make sure to thaw it out completely, it comes out great.