Cook the chicken (or use rotisserie chicken or freeze dried chicken) and cook to your liking (grilled, roasted, slow cooked, etc.). Once the chicken is cooked through, shred or dice into bite sized pieces.
On a cookie sheet, cut the French bread loaf horizontally and lay flat, opened onto the pan. Spread the bbq sauce evenly over both halves. Sprinkle the cheese onto the bread. Add the chicken, onions, blue cheese on top of the cheese.
Bake at 350 degrees for 15-20 minutes or until the cheese is melted. Remove from the oven and sprinkle with fresh, chopped cilantro and serve.