Poor People's Food

So on my last day of work one of my co-workers wanted to make a going away lunch for the whole department that I could eat(vegan). She decided she would make "lazy pierogie" which is basically a layered dish with lasagna noodles,sauerkraut,mushrooms and onions. I guess she decided against the potato version when I informed her,"no I can't eat condensed cheddar cheese soup"! Now,don't think I am an ungrateful brat because I told her multiple times thanks but no thanks,don't worry about me blah blah blah. So anyways,she went with the cabbage version. It was good,I ate some even though I am pretty sure the margarine wasn't vegan and I thought it was very nice until I heard her telling one of the other girls in the back who didn't want to eat it that it was "poor people's food"! I was honestly surprised that there are still people who are so ignorant that they think of healthy veg based food negatively. I didn't say anything because I just wanted to finish my shift quietly and get the frig out of there but I thought that was really annoying. I NEVER ask anyone to go out of their way for me and this is why. The way I eat is a huge part of who I am and when someone disses it like that it is a huge slap in the face.