In a bowl, blend all the ingredients together, except for the marinara sauce.
Form into golf sized (or smaller) balls.
Place a layer of meatballs on the bottom of your slow cooker, and drizzle with some of the marinara sauce.
Place another layer of meatballs.
Drizzle more marinara sauce.
Repeat until all meatballs are in the slow cooker.
Set slow cooker to high for 2 and a half hours.
Enjoy!