Mix the Tuna and Mayonnaise with a drizzle of olive oil.
Place the tapioca in the cold non-stick frying pan, covering the entire surface and use a spoon to arrange it, so that no holes or cracks remain in your tapioca. turn on medium heat until loose.
Remove from the skillet and place the tuna paste in half the tapioca and fold. Serve with salad and tomato.