Food for Teacake:
Nothing - Sandwiches, salads (though buying things fresh without a fridge would mean more trips to the shops), fruit, Quorn/ own brand meal pots, peperamis are cupboard safe too
Kettle - Couscous, Pot Noodles (supermarket own brand will be cheaper), Mug Shots, pasta pots like Batchelors ones for example, you could even add sliced fresh veggies or meat to them to add some goodness
Toaster - toast, crumpets, potato waffles, teacakes
Microwave - tinned food (soup, beans, chilli, veg, etc), jacket potatoes, ready meals, liquids (eg milk for hot chocolate), scrambled egg, bacon at a pinch. Microwave rice packets too.
Fridge - will keep fresh food and leftovers fresher for longer. Milk, Yoghurts, salad, meat. Butter, cheese
Freezer - can bulk cook meals and save portions of them for as and when. Frozen veg. Ice cream. More ice cream.
Hob - pasta sauces (eg bolognese), stir fries, omelettes, boiled eggs
Grill - grilling
Oven - roasting and baking
And this post is a wiki if anyone fancies adding anything.