Combine Greek yogurt with hot sauce and set aside.
Heat chicken and broccoli in a large non-stick pan over medium heat. Once heated through, remove from the pan and place in a medium bowl.
Toss chicken and broccoli with salt, pepper and garlic powder and then set aside.
Place tortilla in the hot pan and allow to heat through on one side. Flip the tortilla and sprinkle half of the cheese over one half of the tortilla. Top cheese with broccoli and chicken and then sprinkle the rest of the cheese over the top.
Using a spatula, fold the tortilla over on to itself (into a half moon) and top with something heavy (i.e. a weighted pan or my personal favorite, a teakettle). Allow to cook for a minute or two, or until the bottom is lightly browed. Flip the tortilla and cook for another minute or two on the opposite side.
Remove the Quesadilla from the pan and allow to cool for a minute or so before cutting into wedges. Top with spicy yogurt and enjoy!!