- In a 4-quart pan, sauté onion in olive oil until tender. Add garlic to onion and sauté an additional minute.
- Stir in crushed tomato, sugar, Italian seasoning, and salt. Simmer 10-15 minutes over medium heat, stirring occasionally.
- Add thawed meatballs to sauce. Cover pan and continue to cook over medium heat an additional 10-15 minutes, stirring occasionally, until meatballs are heated through.
- Place a meatball and 1 tablespoon of sauce in the middle of each split roll. Secure each meatball to the bun with a wooden toothpick.
- Serve immediately.
Note: Any remaining sauce can be used for dipping breadsticks or pizza later.