Make yourself a meal plan and prep it at the weekend.
For example - stick a few peeled onions in your slow cooker with 4 tins of tomatoes, any veg you have on hand and some basil & garlic (takes 5 mins to throw in). Leave it for 4 hours on high (or 6-8 on low) then blitz it into a smooth sauce. Freeze in 2 cup portion sizes in bags. I put mine on overnight on low.
Then e.g. Sunday night - take a sauce bag and 500g mince out of the freezer, put in the fridge.
Monday when you get home, brown mince, add sauce, leave to simmer while you do DC bath & bed, serve with pasta (and I always throw some broccoli in the pasta pan too). While one of you clears up, the other one preps some fish parcels (onion slices, piece of salmon on top, lemon or orange and dill on top of fish, make into foil parcel) and put in fridge.
Tuesday - fish parcels in oven on 180 for 20 mins, spuds in water to boil, put DC to bed while dinner cooking, veges in steamer above potatoes for 5 mins. Again - one person clears up, other person chops lots of veges (onion, pepper, broccoli, squash, top & tail snow peas, mushrooms, whatever you like) ready for Weds.
Weds - stir fry veges, add two tablespoons red curry paste and coat then pour in tin of coconut milk. Leave to simmer while you put DC to bed, serve with rice if you want or put some naan in the oven.
Etc etc. We have a 4 weekly menu cycle so we don't get bored and each week has its own spreadsheet shopping list. The most time consuming element is sitting down and working it all out to begin with. I do batch cook at the weekend as well so we have frozen "ready meals" when things don't work out (because days overrun, or you forget to take something out the night before, or the DC are sick) and some nights we eat pizza because we like it! The tomato sauce above works well as a pizza sauce too if you reduce it down a bit further so it's thicker, and I make & freeze pizza dough so it's there if we want it.