DS 7m, MIL looks after him for a few hours once or twice a week while I MN study. Do I just suck it up as she is being so helpful (not that she minds - she loves having him) or, since everything he and we eat is cooked from scratch, ask her not to use jars, which is how she cooks. Am I being undgrateful/ unreasonable/neurotic? I am more than prepared to stock up her freezer with stuff I've made, not sure how she'd feel about that tho.
I would let him have your MIL's food tbh. One meal a week of pasta bake is not going to do him any harm, I doubt that at 7 months he is even going to eat very much to make much of a nutritional impact.
I think you are being a tiny bit neurotic, but then we all are with our babies! Just in the grand scheme of things it does not matter that much.
Just wait until he gets invited to his first McDonald's birthday party followed by loads of sweets in a party bag, a bit of pasta bake is gonna see like small fry then!
If everything else is cooked from scratch and the salt content is ok, I wouldn't worry about it.
If want to test the water you could always offer to provide his food though to save on her shopping bills - present it like you are doing her a favour? But if you think it is likely to offend her I wouldn't bother - pick your battles!
I think you're being a bit PFB about it tbh -unless the jar is stuffed full of crap, it's not actually going to hurt him. And if you didn't specify what he could and couldn't eat before she started looking after him, anything you say now is going to look critical.
My mum also gives my DS stuff to eat which I wouldn't feed him but I've just stopped being so precious about it because it's a small price to pay for her looking after him really