I'd go for plenty of fish if you lack protein.
Easy, healthy dinners like:
Pan-fried salmon with soy, lime and sweet chilli sauce, with egg noodles and stir fry veg
Cod or hake with finely sliced fennel, lemon, chilli, spring onion and a splash of wine, wrapped in paper parcels, served with steamed broccoli and baby new potatoes
Smoked haddock kedgeree made with peas, parsley, onion, egg and loads of mild spices which are very good for you
Pasta puttanesca - probably not a trad recipe, but I make it with red onions, red peppers, tomato, sardines, anchovies, olives, chilli, garlic, red wine and parsley.
Tapenade roast cod - You can just spread pesto, a bit of olive tapenade and a few chopped sun dried tomatoes on cod and bake it with tiny new potatoes, and serve with steamed greens or garlic spinach.
What about eggs - a frittata of onion, red, yellow and orange peppers, potatoes, peas, garlic and herbs, with a leafy salad?
Stir fry veg with edamame beans, cashew nuts, tofu if you like it, and egg noodles would be a good source of protein.
Try switching all your bread and rice to wholemeal as that has more protein in it.