Heat oven to 400 degrees and line a large baking sheet with parchment paper
Using a food processor, grate the zucchini
Place the zucchini in a large mixing bowl, toss with 1 tsp of kosher salt and allow to rest while you prepare the other ingredients
Using the large blade of your food processor, add both the white and dark meat chicken and grind until completely fine
Squeeze the zucchini to remove any excess water, drain any remaining water from the bowl and place the zucchini back in the mixing bowl
Add the ground chicken, minced garlic, dill and scallions, remaining salt and pepper, lemon zest and juice and extra virgin olive oil and mix with your hands until completely combined
Add the crumbled feta and panko and gently toss until incorporated
Use a small ice cream scoop to make equal-sized meatballs and place on your parchment lined baking sheet, about a quarter inch apart. You should hve 40 meatballs total
Bake for 20 minutes, turn the heat up to 425 and bake again for another minute or two or the tops of the meatballs are browned