In a large bowl, combine ground turkey, bread crumbs, onion, parsley, eggs, garlic, Worcestershire sauce, basil, oregano, salt, and pepper.: The moment you fold these components together you should notice the wet ingredients beginning to hydrate the bread crumbs , which creates a tacky, cohesive mixture that will hold shape. Breathe in the mingled aroma of garlic , onion , and herbs, and stop mixing as soon as the ingredients are evenly distributed to avoid a dense texture. A common error is overmixing, which compresses the meat and yields tough meatballs; be gentle and intentional with each fold.
Using a strong spatula or your hands (I like to wear latex gloves), mix well. Shape the mixture into 1-inch balls (you should have around 48 total).: As you portion and roll, pay attention to the feel of the mixture, it should be springy and slightly tacky but not wet. Rolling with consistent pressure ensures uniform cooking times. If the mixture feels too loose, refrigerate for 10 to 15 minutes to firm up; if it is too stiff, a tablespoon of cold water will help. Avoid compacting the meat tightly, which can create dense centers.
Preheat oven to 400 degrees. Line a rimmed baking sheet with foil for easy cleanup. Coat a wire rack with nonstick spray and set on prepared baking sheet.: When the oven reaches temperature, the air inside will be hot enough to promote even browning and set the surface quickly. The wire rack allows hot air to circulate, encouraging crisp edges on all sides. Skipping the rack and placing meatballs directly on the sheet can create a steamed bottom, so use the rack for best texture.
Arrange meatballs on rack, brush with oil, and bake until browned with crispy edges, about 15 to 20 minutes (an internal thermometer should read 165 degrees for 15 seconds).: As the meatballs bake you will see juices bead on the surface and the edges begin to caramelize, yielding a toasted aroma. Brushing with olive oil promotes a golden finish and mouthwatering color. The key is to look for even browning and to verify doneness with a thermometer, because undercooking leaves a raw center and overcooking dries them out.
Heat oil in a large skillet over medium-high heat. Fry the meatballs in batches until browned on all sides and the meatballs are cooked, about 5 to 7 minutes per batch (an internal thermometer should read 165 degrees for 15 seconds). Add more oil between batches if the skillet looks dry.: When frying you should hear a clear sizzle as each meatball hits the pan, and that sound is an instant signal that a flavorful crust is forming. Rotate them gently with tongs to ensure uniform color, and watch for a deep, nutty scent as the exterior browns. Crowding the pan traps steam and prevents browning, so work in batches and maintain the oil at a steady medium high heat to avoid burning.
Arrange in a single layer on a baking sheet, not touching. Freeze until solid, about 1 hour, then transfer to a freezer-safe container and store up to 1 month.: Lay the meatballs apart so they freeze individually, which preserves texture and makes portioning easy later. Once frozen, transfer them to a labeled container and return to the freezer; they reheat nicely in sauce or by baking. The usual mistake is tossing warm meatballs into a bag where they clump together, making them hard to separate later, so ensure they are solidly frozen first.