1. Boil potatoes until soft. Remove from water and mash until they are as smooth as possible. Let cool. Add tuna, mayonnaise, salt, and pepper and mix well.
2. Make round balls and flatten slightly.
3. In a shallow dish, whip eggs and add pinch of salt and pepper.
4. Heat oil in a sauté pan over medium heat.
5. Dip both sides of each patty into egg. Add to oil and fry until lightly golden brown on all sides. Remove and place on paper towels. Sprinkle with chopped cilantro and serve.