Preheat your oven to 375°F.
Slice the top off the bell pepper and remove the seeds, setting aside the top for later use if desired.
In a bowl, combine the chicken breast (diced or shredded after cooking), buffalo sauce, garlic powder, onion powder, paprika, salt, and pepper.
Sear the seasoned chicken in a non-stick skillet over medium-high heat until cooked through, about 5-7 minutes. If using pre-cooked chicken, simply mix with the buffalo sauce and spices.
Stuff the bell pepper with the buffalo chicken mixture.
Place the stuffed bell pepper in a baking dish and bake in the preheated oven for 15-20 minutes, until the pepper is tender.
While the pepper bakes, mix the nonfat Greek yogurt with a pinch of salt and pepper to create a light ranch dressing.
Once baked, remove the pepper from the oven and drizzle the Greek yogurt ranch over the top.
Garnish with diced avocado on top for a creamy finish, and enjoy your flavorful, protein-packed meal.