More videos from this episode Mayonnaise Emulsification What is the science of emulsification, and how do you sustain one? Flank Steak and Arugula Sandwiches with Red Onion This upscale steak sandwich is easy to execute. Classic Tuna Salad Three simple steps eliminate the twin problems of tuna salad: watery texture and bland flavor. Classic Grilled Cheese Sandwiches Butter the bread rather than the skillet, grate the cheese, and cook over low heat for sandwiches with a lacy-crisp exterior and a tender, oozing interior. Tuna Packed in Olive Oil Are all brands of tuna packed in olive oil created equal? We tested six to find out.