Preheat the oven to 375F, and line a baking sheet with some parchment paper. Lightly spray it with nonstick cooking spray.
In a bowl, mix together the shredded, cooked chicken, pepper, onion, salt, pepper, and ranch dressing.
Lay out the crescent roll dough on the cookie sheet and pinch together any open seems. Using a pizza cutter or sharp knife, cut lines all the way down (even on each side) so you can braid the loaf, leaving the middle uncut for your filling (see picture above).
Place the chicken mixture on the croissant dough filling the middle from the top to the bottom. Break the cheese slices in half and lay them on top of the chicken mixture. Then, using the cut sides, braid the bread to seal it closed. Be sure to seal any open seems. Brush the egg wash on the bread.
Bake it in the oven for 27 minutes or until golden brown.
Once it has slightly cooled, cut it into 8 equal servings.
Serve immediately. Enjoy!