Preheat your oven to 375°F (190°C). Line a large baking sheet with parchment paper or lightly grease it with non-stick cooking spray to ensure the bites don’t stick.
Heat the olive oil in a small skillet over medium heat. Add the diced onion and celery. Sauté for about 5 minutes until the vegetables are soft and translucent. Set them aside to cool slightly.
In a large mixing bowl, combine the ground turkey, breadcrumbs, egg, sage, thyme, garlic powder, salt, pepper, and the sautéed vegetables. Pour in the chicken broth slowly to add moisture.
Using your hands or a large spoon, mix everything together until just combined. Be careful not to overwork the meat, as this can make the stuffing bites tough.
Scoop about 2 tablespoons of the mixture at a time and roll it into a ball, roughly the size of a golf ball. Place each ball on the prepared baking sheet, spacing them about an inch apart.
Place the baking sheet in the oven and bake for 20 to 25 minutes. The bites should be golden brown on the outside and reach an internal temperature of 165°F (74°C).
Remove from the oven and let them rest for 5 minutes. Garnish with fresh parsley if desired, and serve warm.