I don't have time to do it much anymore, and dd is not a fan of Sunday roasts so I am not in the kitchen as much on sundays, but I used to always prep Monday's dinner while doing the roast - make a lasagna, shepherds pie, curry sauce, chilli, smoked fish and broccoli pie (mash top), spaghetti Bol sauce etc - so I either have these set up in the oven ready to eat when we get in, or I just need to reheat main part and quickly boil rice or pasta. Most weeks was a double batch as all those freeze well, and I'd use a previous week,S option later in the week also.
Also prep veg, peel potatoes or marinade meat etc are useful things to do after dinner one night to start the prep for the following night. (Or taking things out of the freezer to defrost!).
Chicken ideas:
Fajitas, tacos, enchiladas or quesadillas
Chinese stir fries - use a packet of sauce or Chuck in some Chinese rice wine, soy sauce and garlic into the mix; and whatever mix of veg you have - great to use up handfuls of small amounts of things, and plenty of tinned/frozen veg is good to add in too - sweetcorn, peas, bamboo shoots etc
Curries - there are loads of different types to mix it up, start with frying onion, garlic and ginger, add some spices (loose or a pre-mixed pack, Green Saffron ones are good, or a jar of wet spices like Pataks masala or korma pastes), it can be a tomato or coconut milk based sauce, perhaps with some stock to thin it out, and some veg as well. Squeeze of lemon or lime juice can make a big difference at the end, and also a spoonful of natural yoghurt. Indian, thai, Chinese, Vietnamese...lots of different types and tastes.
Pasta dishes, involving tomatoes based sauce, or maybe some white wine and cream and stock for a different sauce, with mixed Mediterranean veggies (tomatoes, peppers, courgette, onion, garlic, French beans....) or just plain mushrooms.
One we like to do with joints (another good food recipe for part boned breasts but I regularly do it with thighs as well) is feta chicken- under the skin of a joint, put a pinch of thyme leaves and a hunk (50g - but as much or as little as you like really) of feta cheese. Season with salt and pepper, drizzle olive oil,over the top and roast. I usually serve with roasted baby potatoes (I toss these in olive oil with garlic granules, lots of pepper and sometimes some lemon juice in a ziplock bag before roasting) and some French beans simply steamed or diced mixed Mediterranean veg roasted.