Slow Cooker Meatballs

Name: Slow Cooker Meatballs
Prep time: 15 min
Cook time: 6 h
Total time: 6 h
Yield: 6
Ingredients: Ingredients; 1 1/2 pounds ground beef (or a mix of beef and pork); 1/2 cup breadcrumbs; 1/4 cup grated Parmesan cheese; 1 egg; 2 cloves garlic, minced; 1 teaspoon onion powder; 1 teaspoon Italian seasoning; Salt and pepper, to taste; 2 cups marinara sauce (or your favorite pasta sauce); 1 tablespoon olive oil (for browning, optional); Fresh parsley, chopped (for garnish, optional)