In the United States, to “eat humble pie” means to apologize for one’s actions. But humble pie is also an actual dish that you can eat. Its origins are, appropriately, humble. Although there are fancy recipes, humble pie began as a medieval European dish consisting of the scraps of the master’s food baked into a pie. “Humble” began as the Middle French word “nomble,” meaning “scrap.”
Lars D.H. Hedbor baked this version using a recipe published in Elizabeth Smith’s 1739 cookbook The Compleat Housewife. He was quite faithful to the recipe, even though it called for items that would be considered odd today, such as orange blossom water.
-via VA Viper