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Crockpot Meatball subs

Crockpot Meatball Subs

Frozen meatballs cooked in the crockpot. Served in toasted sub sandwich rolls, smothered in marinara sauce and melted mozzarella cheese.
Prep Time 10 mins
Cook Time 4 hrs
Total Time 4 hrs 10 mins
Course Dinner, Lunch
Cuisine Italian
Servings 8 subs


  • 2- 24 oz Marinara sauce
  • 26 oz Frozen Italian Style Meatballs
  • 8 French sandwich rolls
  • 16 slices Mozzarella cheese
  • grated Parmesan cheese garnish
  • parsley leaves, chopped garnish


  • Put your frozen meatballs in the Crock-Pot.
  • Pour both jars of marinara sauce into the Crock-Pot over the meatballs.
  • Cover and cook on high for 4 hours. Note: my slow cooker cooked very fast so these were done in under 4 hours. The meatballs are done when the internal temp is 160°F.
  • Preheat the oven to 350°F. Place the rolls on a baking sheet, face up and open. This will toast the inside of the rolls.
  • Toast for about 5 minutes or until the insides start to get brown and crispy.
  • You can 2 slices of mozzarella cheese to the inside of the rolls and return the oven until the cheese melts. OR you can wait until the end to top your meatballs with the cheese so it melts over the top.
  • Add about meatballs to each roll until full but not over stuffed.
  • Garnish with Parmesan and parsley. Optional: serve with additional marinara from the Crock-Pot for dipping.


  1. Place frozen meatballs in a slow cooker. 
  2. Pour both jars of marinara over the top of the frozen meatballs.
  3. Cover and cook on high for 4 hours. 
  4. Preheat your oven to 350 F. Open your hoagie rolls so the inside will get toasted. Place your rolls on a baking sheet and toast for about 5 mins. 
  5. Add 2 slices of Mozzarella cheese to each hoagie roll and return the rolls to the oven. Continue to toast for 5 minutes or until cheese is melted. 
  6. Add about 4 to 5 meatballs to each hoagie roll. 
  7. Garnish with grated Parmesan, chopped parsley and a sprinkle of red pepper flakes.  
  8. Serve with a side of additional sauce from the slow cooker. 
Keyword comfort food, crockpot, Meatballs, subs