My aunt makes this stuff called "Black Soup". My mom used to make it, too, but it has been years since I've had it. What's in it? I can't remember exactly, but I think it has noodles and dried fruit. (It is not the icky stuff with animal by-products in it that you see when you google for a recipe for Black Soup.) I remember not liking it as a child (imagine that) but I couldn't tell you if I like it now that my tastes have matured. Of course, I use the word "matured" rather loosely here.
Some people will name fishsticks, some people Hot Cross Buns, some say eggs or mac'n'cheese, but when I think of traditional Lenten food, this is what comes to mind:
I haven't had this for years, so when I found myself alone and about town at lunchtime last week, it was a Shamrock Shake and Filet-O-Fish nostalgia meal for me. It was pretty good, but why I feel like it is traditional is beyond me.