'My Favorite Challah'

'The word challah originally meant only the small portion of dough that was put in the oven when baking bread as a reminder of the destruction of the Temple in Jerusalem. It has evolved into the twisted, sweet, almost brioche-like bread that was brought to America by immigrants from Central and Eastern Europe. Although straight loaves of braided challah are eaten throughout the year, round challahs, often studded with raisins, are served for Rosh Hashana, and also for Yom Kippur and Sukkot, the holidays celebrating the New Year and the fall harvest. Throughout the years, I have picked up tips from challah bakers throughout this country and in Europe and Israel. For example: Several risings make a better loaf, and if you want an especially brioche-like texture, let the dough rise slowly in the refrigerator for one of the three risings. The secret to a glossy loaf is to brush with an egg wash twice, once just after braiding and then again just before baking.'

https://cooking.nytimes.com/recipes/7199-my-favorite-challah?