Jerk Chicken Wraps

Name: Jerk Chicken Wraps
Ingredients: 4 skinless, boneless chicken breast halves, butterflied; 1 tablespoon jerk seasoning paste; 1 tablespoon extra-virgin olive oil, plus more for brushing; Salt and freshly ground pepper; 1/4 cup mayonnaise; 1 tablespoon fresh lime juice; 1 garlic clove, minced; 2 tablespoons chopped cilantro; Six 10-inch flour tortillas; 1 bunch watercress, thick stems discarded