Easy Slow Cooker Mozzarella-Stuffed Meatballs And Sauce

Sauce

• 7 cups crushed tomato (1.4 kg)
• ⅓ cup onion (50 g), chopped
• 2 cloves garlic, crushed
• 2 teaspoons dried basil
• 1 teaspoon dried oregano
• ½ teaspoon pepper
• ½ teaspoon salt

Meatballs

• 1 lb beef (455 g)
• 1 lb mild sausage (455 g)
• 1 cup breadcrumb (115 g)
• ⅓ cup onion (50 g), chopped
• ¼ cup parmesan cheese (25 g)
• 1 teaspoon onion powder
• 1 teaspoon garlic powder
• 1 teaspoon dried thyme
• 1 teaspoon dried oregano
• ½ teaspoon salt
• ½ teaspoon pepper
• 2 eggs
• 4 sticks mozzarella cheese, cut into 4-5 even pieces each
• ½ cup whole milk
• ½ cup parsley