I don't understand why some vegan/vegatarian try to covice other, it' absuluty natural to eat animals, humans are omnivores.
But put yourselfe in their position. They don't like, or execrate meat, or it's against their belief. And then you want that they cook meat for you? If you make vegatarian food you "only" have to leave the meat and/or put add some tastless tofu.
Would you cook something that you execrate for? Would you cook frog, horse, dog, cat, guinea pig, spider, skorpion, locusts, maggots or similar things? In parts of the world it is normal to eat this kind of food. If yes, I'm certain you hate some kind of food. Would you cook and season to taste all of this?
Sooner or later every vegatarian I know I've seen has eaten animals, but many don't admit that. It's only fish
or shrimps
even chicken
I heard.
In japan a few have experience to make a vegan food out of human shit, they use the gut bacteria. Maybe you can get some for your vegan/vegatarian freeks.
I've heard that vegatarian living Indian became ill when they lived in europe. It exposed that they got their animal vitamins from shit that adhere on their food plants. In europe, the hygiene was to high.
It' not healty to live vegan/vegatarian.