If you love canh chua (Vietnamese hot and sour soup), Ca Kho To (this dish usually accompany the hot and sour soup), and rau muon xao toi (ung choi with garlic), definitely check out Lemon Grass. They have two location in Seattle, one on 12th (by Seattle University) and one on Jackson. Although the place is not as glamorous as Tamarind nor do they have fancy mixed drinks, it does have it's own charm and their food is more authentic. The chef was hired from Vietnam, so the food is more homely. Try going there for dinner, they also have a pretty extensive lunch menu. My favorite lunch dish is the five spice chicken (ga ngu vi huong).