Preheat the broiler and set an oven rack on the second-highest rack. Line a baking sheet with heavy duty aluminum foil and grease with the Extra-Virgin Olive Oil (1 tablespoon).
In a bowl large enough to hold all of the ingredients, beat the Egg (1). Add the Fresh Baby Spinach (3 ounce), Scallion (3), and Garlic (3 clove) and stir until evenly combined.
Add the 93/7 Lean Ground Turkey (1.25 pound), Italian Turkey Sausages (1.25 pound), Shredded Mozzarella Cheese (1 cup), Parmigiano-Reggiano (1 cup) and Italian-Style Breadcrumbs (1 cup). Using your hands, mix until evenly combined.
Shape the mixture into 1-1/2 inch balls and place on the prepared baking sheet.Broil the meatballs until golden brown on top, about 10 minutes.
Meanwhile, heat the tomato Marinara Sauce (24 ounce) in a large pan on the stovetop. Add the broiled meatballs and simmer over low heat for 5 to 10 minutes, or until the meatballs are fully cooked.