Prepare your slow cooker! Line the pot with a plastic liner for easy clean up, and pour 1 jar of marinara sauce evenly across the bottom of the cooker.
Combine: meats, bread crumbs, cheese, garlic, onion, egg and seasonings into a large mixing bowl.
Mix until well blended.
Form 1 inch "balls" and place on baking sheet lined with parchment paper. Makes almost 3 dozen at the 1" size.
Broil in oven for 8-10 minutes. Meatballs should have a slight "crust" on the surface.
Gently remove the meatballs from the baking pan and place into the slow cooker on top of the sauce.
Pour second jar of marinara sauce over meatballs. DO NOT STIR! Cover and cook on low for 6-8 hours. High for 4-6 hours.
When done, pour over your favorite pasta dish or make meatball sandwiches! Then enjoy!