Watercress salad

Watercress Salad (known as Watercrest Salad in the online version) is the only dish that Grandpa knows how to make. It is a uncooked bowl of watercress and some other green-vegetables floating in a bowl of water mixed with vinegar, and even though it tastes disgusting, Grandpa loves it and forces Greg and Rodrick, who hate this salad, to eat it.

Appearances

 * Diary of a Wimpy Kid Online (first appearance)
 * Diary of a Wimpy Kid: Rodrick Rules (first book appearance, last appearance)