Strong to the Finich
Olive runs some kind of boarding school. She serves her charges a huge bowl of spinach, but they are less than enthusiastic about it. Popeye comes by and demonstrates the values of spinach: he feeds some to a tree, which grows huge and sprouts a variety of fruit; he feeds a hen, which lays a dozen eggs, and he eats some himself to resist a prizefighter passing by.
Directors: Dave Fleischer, Seymour Kneitel
IMDB: tt0025842