1. In a bowl combine the turkey, bread crumbs, pesto, Parmesan and egg yolk. Use your hands to really mix the ingredients well. Form into 1 1/2 inch balls and place one a large plate. Place plate in the microwave and microwave on high for about 5-7 minutes. Meatballs will get firm. Drain grease off.
2. Pour spaghetti sauce in bottom of slow cooker. Gently place meatballs on top of sauce.
3. Cover and cook on LOW for about 3-5 hours. Serve meatballs and sauce over hot cooked noodles. Salt and pepper to taste.
I was excited to eat these meatballs because I love pesto. I was surprised that the flavor of the pesto was pretty subdued. They were super yummy just not really pesto-y. Because pesto is so expensive (almost $5.00 for a little container) I probably won’t make this recipe again, as is. I would just substitute tomato sauce (or something) for the pesto to bring down the price. The microwave is worth using because if you don’t you’ll have a ground turkey spaghetti sauce instead of meatballs. 4 stars.