Wet bread with water, squeezing excess out. Tear into small pieces and place in a large bowl.
Combine bread pieces with ground turkey, egg, grated zucchini, breadcrumbs, minced garlic, grated red onion, chopped mint, parsley, oregano, salt, and pepper in the bowl.
Using a 1/4 cup measure, form each meatball into slightly flattened patties. Refrigerate before cooking to help hold their shape.
In a large nonstick frying pan, spray with olive oil and cook meatballs over very low heat, turning halfway, about 5 to 6 minutes per side, until cooked through. Alternatively, bake at 350°F for 20-25 minutes.
On the grill, clean grill well and spray grate with oil. Cook meatballs on low heat until cooked through, about 5 minutes per side.
Notes
Great for make-ahead meal prep lunches and delicious served with tzatziki sauce or over rice.