Sara goes on a tapas tour of Barcelona - from a historic nut roasting shop to an unmarked dive with a secret recipe for its viral mashed potato and meat delicacy, the Bomba. On Ask Sara, answers questions about Salt and Garlic. Later, a guest from Lyon makes two dishes that show why it's the culinary capital of France - Poulet au Vinaigre (Chicken in Vinegar Sauce) and Cervelle des Canuts (a cheesy dip).