Place your wrap down on a flat surface. Spoon the dressing not in the middle, but closer to one side, leaving a 1-inch border between the spread and the edge of the wrap. Place the chopped lettuce over the dressing.
Drain the can of mackerel and gently flake the mackerel with a fork. Spoon the mackerel over the lettuce, and top with lemon zest, cheese, cracked pepper, and a squeeze of fresh lemon juice.
Fold in the two sides of the tortilla, and roll up like a burrito. (Sometimes your wrap packaging will have visual instructions). Slice in half, and enjoy!