Few suggestions - not all will help with just what you've got in your cupboard at the mo but might be useful for future menu planning. I was made redundant 2 yrs ago and took 18 months out to be with DD until she started school, but it was a real exercise in belt-tightening for us - it's not much fun, but it improves your imagination!
Omlettes
Filled jacket potatoes
Pasta with virtually anything (although have to admit my DD is probably the only child on the planet that won't touch the stuff)
Buy whole chickens and joint them - use the breast for stir frys which you can bulk out with veg, roast the legs, then boil the carcass to make stock. Strip off any meat left and chuck it back in the stock with sliced spring onion, frozen or tinned sweetcorn, dried noodles and a spoonful or two of sweet chilli sauce. A big bowl of this is a meal in itself.
When making mince dishes - ie shepherds pie, chilli, bolognese - use half mince and half red lentils. I also started throwing a handful of lentils or chickpeas into curries to make the meat go further.
Frozen white fish fillets are usually inexpensive. Make a sauce with tinned toms, onion, garlic and dried herbs - pour over fish in an oven proof dish, top with grated cheese (buy a strong one and you can use less of it) and breadcrumbs (whizz odd bits of bread in food processor or chop into small chunks and freeze them as you go along so you've always got some handy) - bake for 25 minutes.
I now buy most of my veg frozen to avoid waste (although not carrots as tried them and thought they were a bit soggy!).
Lastly, I know people can be really sniffy about tinned meat, and for the most part I'd agree with them - but my DD loves steak pie made with Princes Stewed Steak in Gravy. It's actually quite nice and also makes a great emergency chilli if you throw in kidney beans, tinned toms, onion and a bit of chilli powder and crush the meat up a bit with a wooden spoon.