Heat the sesame oil in a skillet over medium heat. Place the chicken breast in the skillet, and top with 1 tablespoon barbeque sauce. Cook 10 minutes, turn, and top with 1 tablespoon barbeque sauce. Continue cooking 10 minutes, until juices run clear. Cool slightly, and cut into chunks.
Preheat oven to 425 degrees F (220 degrees C).
In a small bowl, mix the remaining barbeque sauce and marinara sauce. Spread evenly over the pizza crust. Sprinkle with mozzarella cheese. Arrange cooked chicken chunks and red onion slices over the top.
Bake 15 minutes in the preheated oven, or until cheese is melted and bubbly. Remove from heat, sprinkle with cilantro, and let sit 10 minutes before slicing.