In a small bowl mix the tuna, oil, lemon juice, salt and pepper.
Set aside.
In two salad bowls divide the lettuce, cabbage, onion, cucumber, peanuts, and sesame seeds.
To make the dressing add all of the ingredients to a blender and blend until smooth and creamy. Add more water as needed to get your desired consistency.
Top each salad with 1/2 the tuna and drizzle with salad dressing.