Partners Hannah Ziskin and Aaron Lindell created two businesses during COVID: House of Gluten (Hannah) and Quarter Sheets Pizza Club (Aaron). Now the two have integrated both into a small shop in Echo Park, just off Sunset Boulevard, near Dodger Stadium in L.A. The pies are resplendent with soft crumb (made from various artisan flours) and sturdy crust, the result of an all-natural starter.