Heat oven to 375ºF. Spray a 13x9-inch baking dish with nonstick spray. Pour half of one jar of marinara sauce into pan and spread evenly; set aside until ready to use.
In a large bowl, combine chicken, egg, olive oil, garlic, parmesan, bread crumbs, herbs (fresh and dried), salt, and pepper. Gently combine the mixture until ingredients are evenly distributed (but don't overmix!). Roll the mixture into about 1-inch meatballs in diameter and place evenly in prepared baking dish.
Cover each meatball with more sauce from the jar and top with cheese. Bake 25 to 30 minutes or until the center of the meatballs reach 165ºF.
When the meatballs are done, remove from oven. Top with fresh basil and serve over cooked spaghetti.
Notes
Make sure to use your best sauce! This one is my favorite, you can get it at most grocery stores or Target!