Brik is a popular Tunisian appetizer that consists of a thin pastry filled with a mixture of egg, tuna, parsley, and spices. The pastry is then folded into a triangular shape and deep-fried until crispy and golden. Brik is known for its delicious combination of flavors and textures, with the crispy pastry contrasting with the creamy and savory filling. It is often served with a squeeze of lemon juice and is a must-try dish when visiting Tunis.