- Heat oil in a 4-quart saucepan. Add garlic, onion, and celery, and sauté for about 5 minutes.
- Add all remaining ingredients except spaghetti. Stir until ingredients are well mixed.
- Bring to boil and reduce heat, cover,and simmer for about 45 minutes or until vegetables are tender.
- Now break uncooked spaghetti into pieces and add into the saucepan.
- Simmer for only 2–3 minutes.