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finished meatball subs on sheet pan next to small bowl of fresh parsley
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5 from 14 votes

Meatball Sub Sandwich (Slow Cooker)

This Meatball Sub Sandwich is quick and easy to make. So comforting with delicious sauce, premade frozen meatballs, and cheese on a roll. Make in a slow cooker for a completely no-fuss meal.
Prep Time10 mins
Cook Time3 hrs
Course: Main Course
Cuisine: American
Keyword: meatball sub sandwich
Servings: 6
Calories: 350kcal


  • Slow cooker


  • 26 ounces bag frozen meatballs
  • 24 ounces  jar (24 oz.) pasta sauce
  • hoagie rolls or buns
  • your favorite cheese


  • Place the 26 ounce bag of frozen meatballs into a slow cooker. Pour the 24 ounce jar of pasta sauce over the meatballs in the slow cooker and stir to cover the meatballs in the sauce.
  • Place the lid on top of the slow cooker and cook on low for 3 hours or high for 1 hour. Keep in mind slow cookers may vary, so check and adjust cook time if needed.
  • Once the meatballs have finished, it’s time to prepare the hoagie roll or bun. Use a knife to cut a hole out of the top of the bun and remove some of the breading from the center. You want to remove enough to make a nice well to add the meatballs.
  • For a toasted bun, place the buns on a sheet pan under the broiler on high for 1 to 2 minutes.
  • Fill the buns with meatballs and sauce. Top the meatballs will cheese and place under the broiler again for 1 to 3 minutes, until the cheese is melted and bubbly. Remove and serve immediately. Enjoy!
  • Store any leftover meatballs and sauce in an airtight container in the refrigerator for up to 3 days. Reheat before serving. Store hoagie rolls or buns at room temperature separate from the meatballs.


  • If you prefer not to use a slow cooker, then use a large pot instead and cook on medium-low for 30 minutes. 


Calories: 350kcal | Carbohydrates: 6g | Protein: 22g | Fat: 26g | Saturated Fat: 10g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 12g | Cholesterol: 88mg | Sodium: 663mg | Potassium: 728mg | Fiber: 2g | Sugar: 5g | Vitamin A: 500IU | Vitamin C: 9mg | Calcium: 32mg | Iron: 2mg