I have RA and when my hands are bad, i seriously struggle to cook so often end up relying on microwave meals as takeaways are so expensive. Its not a bad thing, I just work hard to get the balance right. Do you have a farm foods near you? I use them for their frozen veg, they do a bag of casserole veg that is diced celery, onions, carrots and swedes. They are 3 for £2 and can be mixed/matched with frozen peas/corn/mixed veg. Frozen and pre chopped veg is my saviour!
I cook a ham shank in a big stock pot, then remove it and pull the meat to shreds. Add a bag of frozen casserole veg to the ham water and add a bag of split peas and lentils. simmer until the lentils have fallen in and then blitz it and add the meat. I split it and freeze it so on bad days I can feed my kids a healthy meal that has their 5 a day in it. You can also make chicken and veg soup the same way. if you need to thicken it at all then you can add dried mashed potato flakes and it works a treat.
other good easy meals to increase veg is to add a jar of chopped tomatoes and sweetcorn to pasta bake. Super easy meal, you just add the sauce, veg and pasta to a casserole dish and chuck it in the oven, can be served with sausages for protein or you can even crack a few eggs on top and add grated cheese half way through cooking.
I know its hard at times, I really do. If I have to order a takeaway then I go for chicken kebabs with extra veg skewers and coleslaw. That really isn't a "bad" meal at all so I feel less guilty. Sausage and beans on toast with cheese on top is easy and quick and my kids will eat that all day long, just balance it with some fruit afterwards. Omelettes are a good option for adding stuff too-broccoli, cheese, peppers, tomatoes, ham, chicken, etc. And keep lots of fresh fruit on hand for when the kids say they are hungry! You will find that by putting some planning into place then it will be much easier to sort it all out. If I feed my kids 5 home cooked meals a week then I feel much less guilty if I they have to resort to frozen pizza or a takeaway.