Agree with a compromise - that impacts her too, so yes to it meaning she has to go without certain luxuries.
Also at 10 she is PLENTY old enough to cook for herself too.
Let her have (as long as you can afford) vegan toiletries, new clothes as NEEDED, food (this could actually save you money).
But as a vegetarian myself of 30 years you also need to discuss with her that it's not actually possible unless she goes and lives on a farm where she grows her own crops inc those for textiles which she then makes into her own clothes, toiletries etc to be COMPLETELY vegan.
Surprisingly non vegan products:
Sugar
Chewing gum
Certain plastic products
Arts & craft supplies
Some fortified foods
Medicines (which also by law have to be tested on animals unfortunately)
Books
Smart phones 😉
Batteries...
What's her favourite foods that she may think are vegan/dishes that can be made vegan? Does she actually like green leafy veg, pulses, beans? Because to get a nourishing diet she'll have to eat them a lot! And no more chocolate and very few other sweets are even veggie let alone vegan.
And is she a good eater? Because vegan food is naturally low cal generally speaking so she'll need to eat more to get enough cals & fat.
"And I know people will disagree with me, but I don't think a child should go without animal proteins" can I ask why?
I wanted to go veggie at 14 but my mum who worked full time and did the bulk of the cooking understandably said no, as she wasn't cooking 2 meals every night nor sharing a kitchen while we cooked at the same time. Dad had said it was mum's decision as she did most of the cooking. But she said if I still wanted to at 16 she'd be supportive. I did and both parents were not only supportive spiritually but also practically.
Mum unbeknownst to me had spent the months before I turned 16 finding vegetarian products in our local shops (not easy in the 80's) and some easy/quick recipes. Dad had done similar, more recipes though. Both had also discussed and found information on nutrition queries they had.
They also asked that I get blood tests done, especially iron levels. I have very heavy periods (later Dx with endo) and they were worried about anaemia in particular. So they asked, well more suggested really, that I get my bloods checked before I went veggie and then again 6 months later, earlier if I was having symptoms that were worrying. GP practice were supportive here (and wanted to keep an eye on my iron levels anyway).
I already could cook quite a range of dishes as mum had taught us all to cook from being little and doing jellies and fairy cakes etc.
I was starting college so was going to be eating about 2 hours later than the rest of the family anyway due to the commute. So that meant the kitchen was free for me to use.
Both parents also if we went out to eat were very supportive in accommodating me restaurant wise but also when sometimes I had difficulty asserting myself if eg a supposed veggie dish I'd ordered turned up covered in meat gravy!
I was really surprised that years later both parents said they were very proud of me not only making the choice to be veggie, but also negotiating what was still then a very omnivorous uk. Dad went veggie himself for about 5 years, he still only rarely eats meat but this was more due to ageing/digestive issues.
"My daughter decided to be a vegetarian forty years ago. At that time it was bloody difficult" yes I went veg 30 years ago and there was still an awful lot of lard, cochineal and gelatin being used. It's changed not only due to veggies & vegans but also health concerns & producers being more open to making products available to certain religious groups who eg don't eat gelatin (and yes I'm aware it's not altruistic - it's so they can sell more, but that goes to show the power the consumer DOES have).
I don't sit on leather if I can avoid it, but that's because it sets off my eczema!
What she DOESN'T get to do is to impose HER personal, possibly temporary morals on others. She doesn't want to be forced to sit on the sofa she doesn't get to force anyone else to change what they eat/wear/uses.
I've screen shot the dhal recipe mumsastudent thanks 😉is that tinned lentils? What colour does it matter? I've only used lentils in soup (scots) so bit unsure on how to use them.
Gah - just a wee note - not all pasta is vegan.
"If you're cooking from scratch can't you make up a pot on the side with her stuff in but leave out the meat/cheese whatever or give her portion when it's at the "vegan stage" of cooking before adding what everyone else has and serving?" I get the sentiment but it's not that simple. If op did this for all dds meals her dd would soon be lacking certain nutrients. Whats being left out has to be replaced nutritionally.
Quorn have a decent range of vegan products
www.quorn.co.uk/products/vegan
But even outside of quorn there's usually a decent range of subs in most supermarkets, but you don't rely on subs alone.
www.sainsburys.co.uk/webapp/wcs/stores/servlet/SearchDisplayView?catalogId=10123&langId=44&storeId=10151&krypto=G7uozrw8U4jQF1qPtXw384uCMxP1lgxkFlEVJUqCcAbFTthrnPjYEbiG3ZcrubjLIBEs%2BQJaSqXUwhlq%2FutarAcxxNLBD5%2BnZdHalsyXDwLhPQQznI%2B9swu39JR7nHo07N86tVOGP%2B1CI0yXw2bLoAkw5Avn7QIltxkyTZiL26w%3D
"As for the vegans out there, would you make a meat dish for a 10 year old if they announced they didn't want to be a vegan anymore? Thought not." Bit presumptuous! My dd is omnivore and I happily cook meat for her, I actually wish she ate a bit more as she doesn't like veggie foods that provide certain nutrients and doesn't like red meat (I suspect like me she has trouble digesting it).