Read all about Dash of Jazz's Slow Cooker Turkey Meatballs. Perfect for the work week and quick delicious. The slow cooker turkey meatballs in marinara sauce you see here today came together quickly, easily, and with just a teeny bit of prep. You simply form the meatballs then pile them and your favorite veggies into a slow cooker and pour your sauce of choice over top. Cover and cook then go about your business!