Steps
1. In a small bowl, mix the tuna, parsley, capers, harissa (if using), salt, and pepper.
2. Lay the brik pastry flat on a clean surface.
3. Place the tuna mixture in the center of the pastry.
4. Carefully crack the egg over the tuna filling.
5. Fold the pastry over to form a triangle or half-moon shape, sealing the edges by pressing gently.
6. Heat vegetable oil in a frying pan over medium heat.
7. Fry the brik for about 2-3 minutes on each side until golden and crispy.
8. Remove from oil and drain on paper towels.
9. Serve hot with a lemon wedge for squeezing over the top.