Most casseroles can be frozen, if you precook them, seal them in an air-tight as possible container and do not keep them in the freezer very long. Do keep in mind the larger the casserole, the longer the defrosting and cooking time. What you store them in also makes a big difference. If you have a seal-a-meal or similar product, prepare individual servings or several servings in boil-safe bags or microwave safe bags. These are much easier to make, cook and clean up after. Laying them flat in the freezer will distribute the food evenly and make it easier to defrost and/or cook. Note on the bag with a magic marker what it is and the date it was made. Sliced meats for sandwiches is always an easy thing to fix ... just thaw and place on bread ... no cooking and no fuss ... easy clean-up. Different kinds of meats should be sealed in individual sealed packages ... do not mix your meats, please. Turkey you have cooked or a roast or chicken will always taste better than ones you purchase in a deli. Sliced turkey or chicken with stuffing can easily be used as the main dish. Baked spaghetti is a favorite of mine. Meatloaf is easy to fix. Veggies are usually easy on the tummy. Some fruits freeze and keep very well ... defrost in frig and they are still cool/cold when served. Hint: Blue berries, rhubarb, strawberries and many fruits can be frozen on a cookie sheet, then poured into a zip-lock bag and thawed as needed ... no cooking necessary. Make it simple and easy on both ends! Home made soups and stews are always welcome. Do not confine yourself to just casseroles ... be creative! If you plan on cooking on the grill before you go ... package up some of the items to take to your friend. This shows you were thinking about them and wished they could have been there for your cook out. Cooked hamburgers and hot dogs freeze well ... just take along some lettuce, tomato and buns with you! Start their morning out easy and with a thank-you smile ... even if you don't see it ... buy or make some waffles/pancakes that can be heated in the toaster or microwave and add a bottle of home made fruit syrup. Mash/blend most any fruit ... add sugar or Karo Syrup, cook until it thickens, place in a jar to be refrigerated. Honey with soft butter that has been whipped into it is also a good topping ... real butter, no margarine, please. Jars that have a large opening is usually best, so it can be dipped out with a small dipper or spoon.