Hi, I'm in London and charge £5ph, I included all meals and snacks in that fee but when I needed to increase my fees as had been the same for 5 years, I gave the parents the option of providing all of their own food and still pay same £5ph fees.
The fee structure you mention seems reasonable to me but I would want to see planned menus so that you can make an informed choice as to whether the food your childminder will provide meets with your requirements.
Remember childminders differ and it is ultimately up to them what they provide all beit they are required to have a healthy eating policy, that then brings you down to 'what you think is healthy'.
I used to make homemade things like ckn risotto/spinach, fish pie/veg, spag bol, ckn balls, falafel/humous & pots, tuna bake, ratatouille, fish cakes etc I also only offered fresh fruit as puds for after lunch and fromage frais for after dinner. I didn't consciously not provide fish fingers or sausages but I found it easier for me to cook thos types of thing I provided in advance.
What does she propose to service with fish fingers?
Although your post does not suggest this but you can't really tell your childminder what to provide; you can of course inform her what your dd likes to eat at home and what you provide. You can either provide your own food or look at another childminder who may meet with all of your reqirements.
Do have a chat with her though about asking her to show you a weekly example menu. Good luck.