Your baby can eat what you have, do you cook healthy meals for yourself? Just leave out the salt, sugar, honey and whole nuts.
Breakfast
weetabix, porridge, toast, crumpets all with added fresh or dried fruit.
Snacks
Fresh fruit, dried fruit, flapjack, yoghurts, cheese, crackers, rice cakes....
Lunch and dinner
Cottage pie, lasagne, stews, roast veggies, meat balls, rice, baked potatoes with topping, beans on toast.
I didn't use jars as DS hated them. If I needed to use a prepared meal I'd choose Ellas kitchen, plum or hipp.
If you do continue with rusks, just choose the wholemeal/ reduced sugar ones.
Also you can use tinned fruit as well, just choose the ones in fruit juice. So tinned peaches, pears, pineapple. They are lovely blended up as a puree to mix with breakfast cereal or added to yoghurt.
Good luck and try not to stress, after all it's the milk that is important at the moment.