Nambā Kai no Sho: Shin Ero Ninjutsu Kansei!!

This omake is set during the two-and-a-half years that Naruto spends training with Jiraiya between Part I and Part II. After a day of training, Naruto is eager to cook a fish that they caught. Jiraiya, meanwhile, has writer's block for his next Icha Icha novel, and is unwilling to cook Naruto's fish. (Source: Naruto Wiki)