Joe Ortiz, a baker from Gayle's Bakery & Rosticceria in Capitola, California, shows chef Julia Child how to make crusty sourdough bread loaves in several decorative shapes. First, he makes homemade yeast, pulling bacteria wild and yeast out of the air with a mixture of flour, milk, water, and cumin. Adding more flour, he crafts a dough which he shapes into a loaf garnished with a sheaf of wheat, and mini-loaves shaped like a star and a cluster of grapes.