1. 1. Preheat your oven and prepare your baking sheet: Start by preheating your oven to 400 F (200 C). Line a large baking sheet with parchment paper or a silicone baking mat. This prevents sticking and makes cleanup a breeze.

2. 2. Combine the meatball ingredients: In a large mixing bowl, gently combine the ground chicken, breadcrumbs, finely chopped celery, finely chopped red onion, egg, Greek yogurt, garlic powder, onion powder, black pepper, and salt. Use your hands to mix everything until just combined. Be careful not to overmix, as this can lead to tough meatballs.

3. 3. Form the meatballs: Take about 1 tablespoon of the mixture for each meatball and roll it gently between your palms to form a uniform ball. Aim for roughly 1-inch meatballs. Place them in a single layer on the prepared baking sheet, leaving a little space between each one.

4. 4. Brush with olive oil: Lightly brush the tops of the meatballs with olive oil. This helps them brown nicely and adds a little extra moisture.

5. 5. Bake the meatballs: Transfer the baking sheet to the preheated oven and bake for 15-20 minutes. The meatballs should be cooked through, with an internal temperature of 165 F (74 C), and lightly golden brown.

6. 6. Toss in buffalo sauce: Once baked, remove the meatballs from the oven. In a separate large bowl, pour in your buffalo sauce. Add the hot meatballs to the bowl and gently toss them until they are evenly coated in the sauce.

7. 7. Serve immediately: These meatballs are best served warm, fresh out of the sauce.