I just googled to double check but you can freeze cooked butternut squash so my suggestion there, as it isn’t a food you want to give her a lot of but may need to give her in a squeeze, is to roast it (slice in half, deseed and drizzle with oil then roast) then mash the roasted squash and freeze in small portions. Maybe in ice cube trays?
Can be used then in any other mash you make her or as is for a “side” to whatever else she’s having.
From the other ingredients you have off top of my head:
A tuna “pie” (like a shepherds pie but tuna & onion & maybe peas for the filling and mashed sweet potato maybe with a little squash for the topping. Maybe a little grated cheese on top?
“Fish pie” with tuna and instant mash used to be my go to easy dinner if I was caught out for time/ingredients when dd was about this age/stage. Tinned tuna in water, lowest salt instant mash I could get made up without salt added too but I’d add some herbs for flavour.
Pork and chicken - I would recommend making a couple of casseroles for her with these with some of the veggies, just keep stock/salt out or to a minimum and use herbs instead for some flavour.
Disclaimer I’m veggie
Again serve with the sweet potatoes perhaps with a little squash added although bread would be fine for the carb element too.
Could do her a baby version of bolognese sauce with the tomatoes, onions and lentils that again doesn’t have to be served with pasta, noodles, rice, cous cous or even bread will still work too.
Sardines work well with tomatoes (one of the few things I miss as a veggie is tomato sardines on toast!) you could do her a little sardines and tomato stew with the sardines, tomatoes, onion and kale.
All the above should be freezable I think as I know it’s hard when they’re eating quite small portions!