Have a look at the tinned food on line and pick stuff that is similar to what you would usually eat, and/or break it down by meal type.
My stash includes:
Breakfast: Porridge oats, UHT Milk and juice, tinned and dried fruit, bread mix, homemade jam and compote, peanut butter
Lunches: Soup, baked beans, spaghetti hoops, savoury biscuits, tinned tuna, ham and corned beef, olives.
Dinners: Mostly tinned 'ready meals' - chicken korma, green Thai chicken curry, Korean spicy chicken, chilli con carne - all of which can be served with rice
Stewed steak in gravy - makes a nice makeshift stew with drained tinned carrots and peas and potatoes. Can also turn it into a decent chilli but adding tinned tomatoes and kidney/black beans and a packet of chilli seasoning.
Chicken in white sauce - ditto, could add chopped tinned ham, sweetcorn and mushrooms and make some kind of chicken supreme thing as well with rice or pasta
Hot dog sausages - to have with Idahoan cheesy instant mash and Heinz BBQ beans
Swedish Meatballs in sauce - to have with instant mash
Ratatouille with pasta
I've also just added some of these tuna and sauce sachets which I imagine can also be eaten cold, and corresponding flavours or Merchant Gourmet grains as they were all on offer and keep until mid 2028.
Snacks include high protein cereal bars, savoury nut mixes, chocolate and trail mix. Then tea, coffee, hot chocolate etc...and off the top of my head I think I've got about 35l of water.
Non food wise: I have a large plastic lidded box containing a single burner camping gas stove and 6 cans of gas; matches, lighters, large tealights and old Gu pudding ramekins to put them in; batteries, battery fairy lights and camping lights, baby wipes, battery radio and a stove top kettle.
First Aid kit - this is a good one:
https://amzn.eu/d/0aNqWZNG
Also add any over the counter or prescription meds you need and a good quality hand gel.
Keep some cash and a list of important contact numbers and account details and you're done really.