I use the reduced sugar and salt baked beans.. he has them maybe once or twice a week. I also use things like tinned tomatoes, but these have no added salt too.
I gave lo a bit of my spanish chicken the other day (made with sauce from a jar). He loved it! I would only do this once in a while tho.
If you like soup whay don't you make some? Doesn't take long and then you have the luxury of knowing exactly what your lo is having.
I had a cook up this morning, took me half an hour to make 14 portions of soup for the freezer.... 7 tomato and pepper and 7 carrot and potato! That's lunches sorted for a while then!
J x