Tomato basil mussels

1. Scrub mussels and remove beards.
2. Discard any mussels that do not close when tapped.
3. Drain, seed and dice tomatoes; set aside.
4. In large saucepan, heat oil over medium heat; cook 2 tbsp of the onions and garlic for 1 minute or until softened.
5. Add tomatoes, wine, basil and hot pepper sauce; bring to boil.
6. Add mussels; cover and steam for 4-6 minutes or until mussels open.
7. Discard any that do not open.
8. Transfer mussels to serving bowl.
9. Stiri vinegar (if using) into tomato mixture; season with salt and pepper to taste.
10. Pour over mussels; sprinkle with remaining onions.