Wash the tenderloin and vegetables thoroughly.
Cut the beef tenderloin into bite-sized pieces.
Heat olive oil in a pan and cook the tenderloin until golden brown on both sides.
Slice vegetables (lettuce, cherry tomatoes, cucumber, etc.) into edible sizes.
Drain the oil from the tuna (canned or smoked) using a strainer.
In a bowl, combine the vegetables, tenderloin, and tuna with the dressing.
Plate nicely and serve.