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, the former of which hates this salad, to eat it. Rodrick also pretends Greg likes it making Grandpa give more of the salad to Greg, forcing him to eat it as he doesn't want to hurt his feelings. Once Greg was tired of eating it, during one meal, he decided to fill his pocket with Watercress Salad (Which he thought was gross, but stuck with it since it was better than eating it.)

Appearances

 * Diary of a Wimpy Kid Online (First appearance)
 * Diary of a Wimpy Kid: Rodrick Rules (First and only book appearance)