117 Ways to Cook Hamburger (Season 1, Episode 2; Airdate: 9/13/66)
After chiding her for blowing their money on 109 books for $9, David is surprised and impressed with Julie’s budget — until he realizes she’s forgotten money for food. To compensate, Julie buys 50 pounds of hamburger cheaply and plans to use one of the cookbooks to create variety in their meals, only to find David loathes hamburger. Note in this episode’s introduction, the fateful sandwich’s bread has been switched from pumpernickel to rye.