1. Preheat the oven to 190°C.

2. Cut the avocados in half and remove the pit.

3. In a mixing bowl, combine the cooked shredded chicken with the buffalo sauce, diced celery, diced red onion, and crumbled blue cheese. Mix well.

4. Season the mixture with salt and pepper to taste.

5. Spoon the buffalo chicken mixture into the avocado halves, filling them up as much as possible.

6. Place the stuffed avocados on a baking sheet and bake for 10-15 minutes, or until the avocado is slightly softened and the filling is heated through.

7. Serve immediately and enjoy your delicious keto-friendly Buffalo Chicken Stuffed Avocado!