Spagetti, Lasagna, Meatloaf, Cabbage Rolls, Stews, Casseroles anything you normally make could be made up and frozen in the portions you would need. You could cook chicken, and most meats to freeze and just have to thaw and either heat in the microwave or your oven. Make up a nice salad before your surgery so you can enjoy that for awhile. Just let your imagination help you come up with things you know you will enjoy. There are truly so many options for you. Family and friends can help keep you stocked up on perishables like fresh fruit and bread, milk, whatever. I'm sure many people wouldn't mind preparing a meal here and there for you. It really won't be that much of a problem for you as you are already planning ahead. Wishing you all the best!