The other day, I was talking to a friend of mine about my tiny little cottage baking business. He asked what kind of bread I baked -- I'm not sure he'd ever heard of challah. But we started talking about a kind of bread that his Finnish grandmother used to bake all the time: pulla. Fast forward to about a week later and I sent him a picture of that week's batch of challah and he immediately responded that it looked EXACTLY like his grandmother's pulla. Needless to say, my curiosity was piqued.
He was kind enough to share his grandmother's recipe with me. I made a few tweaks, based on my experience baking challah -- the result was AMAZINGLY delicious.