I found this neat food blog called the Gourmanderie, which spoke of Farmer Boy and the tremendous amount of food that the Wilder children ate...especially young Almanzo. It also provided a link to a recipe for Almanzo's favorite food: fried apples n' onions.
What I thought was so interesting is that this blogger mentions that Laura Ingalls Wilder describes food the most in Farmer Boy and contributes that to Laura living through periods of near starvation growing up. Barbara Walker, the author of The Little House Cookbook, made a similar comment on Dean Butler's new documentary, Almanzo Wilder: Life Before Laura.
Here's a link to the entire article if you're interested.