What item is traditionally sprinkled on top of Challah before baking?

The traditional item that is sprinkled on top of Challah before baking is sesame seeds. This practice enhances the aesthetic appeal and adds a subtle nutty flavor to the bread. Sesame seeds have cultural significance and are commonly used in Jewish cuisine, particularly in relation to Challah, which is a special bread often enjoyed during Shabbat and holidays.

While salt is sometimes used in Challah recipes, it is typically mixed into the dough itself rather than sprinkled on top before baking. Poppy seeds are also used in some variations of Challah, but sesame seeds are the more traditional choice for enhancing the flavor and presentation. Cinnamon, while a popular spice in many recipes, is not a typical topping for Challah and is more associated with sweet baked goods. Hence, sesame seeds are the correct answer, as they are traditionally used to finish and flavor the surface of the bread before it is baked.