roti ?我没吃过这道菜 翻译成英语

roti? I have never had this before 也是可以的。

看来你是跟印度人在说话了... ;> roti就是类似飞饼类的食物吗，现在中国也很流行的。

I have never eaten this before!
如果说好吃或不好吃还可以适当加其他的话在最前面说

I have never eaten this dish

I have not eaten Yandaocai