I tried baking a challah following a recipe of one of my favorite Israeli chefs and I failed, miserably. I tried TWICE, making sure I followed all the instructions. The bread came out vary dense and heavy, not fluffy at all. It doesn't even look like a challah bread. I suspect it's the amount of the dry yeast that was given. • I'm going to try a very similar recipe with a different amount of yeast and a way to dissolve it, I promise to keep you posted.