While it may seem innocent, teasing about my culture's food means you're actually teasing me. You don't have to like it, but you don't have to be rude about it. I have multiple memories from childhood, and even into adulthood, of feeling like an outsider when I brought food from home; the weird side looks, the snickering behind my back, and the snarky comments like "You eat THAT?"
I may seem weird for eating different foods but I think they're also weird for not trying different foods.