Turkey, Spinach & Cheese Meatballs

Name: Turkey, Spinach & Cheese Meatballs
Prep time: 20 min
Cook time: 20 min
Total time: 40 min
Yield: 4 - 6 (makes about 30 meatballs)
Ingredients: 1 tablespoon extra virgin olive oil; 1 large egg; 3 ounces baby spinach, chopped (3½ cups whole; 1½ cups chopped); 3 scallions, white and green parts, finely sliced; 3 garlic cloves, minced; 1.25 pounds 93/7 ground turkey (I use Shady Brook Farms); 1.25 pounds Italian turkey sausage, removed from the casings (I use Shady Brook Farms); 1 cup shredded mozzarella (preferably whole milk but low-fat will work); ⅓ cup grated Parmigiano Reggiano, plus more for serving; ½ cup Italian seasoned bread crumbs; 1 (24 oz) jar marinara sauce, homemade or good quality store-bought