Aruga-yuck

You know how eating a salad is like a punishment?  What if there was a lettuce that didn't just taste like nothing so it could be drowned in salad dressing, but tasted horrible?  Like offensively awful, brush your tongue for 10 years, and still never forget how gross it tastes bad.  But also like make it green and kind of blend in with regular boring lettuce.  

That's the story of how arugula was invented.

Arugula is that spiky-edged green stuff they sneak in salads and sometimes on sandwiches, right?