When the communists sent her husband to prison, Ha Luu baked bread. The year was 1975, and Luu — better known to Portlanders as Christina, the amiable matriarch at Vietnamese soup restaurant Ha VL — suddenly found herself raising five young sons without a partner, or a home. So Luu did what she could to survive, hawking clothes on the street, collecting plastic for a recycler, baking baguettes for simple sandwiches.