Crockpot Meatballs (Italian Style)

Name: Crockpot Meatballs (Italian Style)
Prep time: 25 min
Cook time: 2 h
Total time: 2 h 25 min
Cuisine: Italian
Ingredients: 1 pound lean ground beef; ½ cup panko breadcrumbs; 2 tablespoons Worcestershire sauce; 2 tablespoons milk of choice (or water); 3 tablespoons finely chopped fresh parsley (plus additional for serving); 2 tablespoons finely grated Parmesan cheese (plus additional for serving); 1 teaspoon Italian seasoning; ½ teaspoon kosher salt; ½ teaspoon onion powder; ½ teaspoon garlic powder; ¼ teaspoon ground black pepper; 2 large eggs; 1 (24-ounce) jar prepared tomato pasta sauce; 3 garlic cloves (minced (about 1 tablespoon)); ¼ teaspoon red pepper flakes (optional); Cooked whole wheat pasta; Polenta; Instant Pot Brown Rice (or cauliflower rice); Hoagie buns and Provolone cheese (for making a sub)