Oh no OP
Hope you're ankle heals up quickly.
Do you have access to home delivery grocery shopping? I wouldn't even attempt to shop in your condition!
As for dinners, pre-prepared quiche, pizza, lasagnes and curries are probably the somewhat cheaper option for quick meals. Try to get your DH to cook up meals before he goes. Lots of soups, spag bol, shepherd's pie, curries and lasagne freeze well and cook without too much fuss. Where do you live? Are there any EB members close by or friends or family that can help you out? If I live close to you I could make some meals for you.