Cooking:
Have food you like and eat anyway that you don't need to.heat up, eg:
Tinned meat, fish, beans, seeds, nuts, peanut butter
Crackers, biscuits, wraps,
Jarred veg like beetroot, pickled onions (only stuff you actually like)
Dried fruit (Aldi has a wide range)
Chocolate,sweets etc (calories on the go)
Christmas cake. (Lasts well past it's date)
Jam, honey, treacle, syrup, Nutella
Lots of people have a BBQ. You can get disposable ones with a small stand.
Or camping stove. These are good for outdoor spaces only. Small camping stove used on expeditions.
Have some just add hot water food:
Packets of couscous (DD adds tinned beans, olives raisins and seeds)
Mug shots, instant noodles, instant custard, gravy, cup soup.
Some just heat up food
Tinned veg, curries, rice pudding, custard, beans, (baked or kidney)
Microwave rice. Dal pouches. Soups
(Always good when you are ill)
Most likely scenarios are illness, winter storms with possible power cuts, snow, flooding cutting you off from shops. Hybrid war and cyber attacks or just the bank going down when they try and upgrade their systems.
Have a bit of spare cash and change so you can top.up from the corner shop.