On the morning I meet with Lisa Sadleir-Hart to make homemade yogurt, I’m a little frazzled. It’s early, I’m not sure if this is the right house, what sound does yogurt make, anyway? I take my shoes off and walk into her quiet, dimly lit home, sunlight pouring in from the kitchen windows. And I’m forced to relax. Because Lisa isn’t just making yogurt. She’s doing yoga.