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Export 10 ingredients for grocery delivery
Step 1
Add the olive oil, crushed tomatoes, tomato paste, onions, water, garlic, Italian seasoning, salt and pepper, and sugar to a 5-qt.+ slow cooker insert. Stir well.
Step 2
Nestle the frozen meatballs in the sauce and cover.
Step 3
Cook for 4 hours on high or 6 hours on low, until the sauce is bubbling and the meatballs are heated through.
Step 4
Add desired number of meatballs to the sub rolls and top with Parmesan cheese. Alternatively, you can also top them with shredded mozzarella cheese. Then place them on a baking sheet under the broiler on high for 3-4 minutes until the cheese is melted and bubbly.
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