Sherry Cherry Tomatoes

Ingredients

• 2 tablespoons extra-virgin olive oil, 2 turns of the pan
• 3 large cloves garlic, finely chopped
• 1 small onion, finely chopped
• 1 pint cherry tomatoes
• 2 tablespoons sherry vinegar or dry sherry wine
• 1 teaspoon sugar
• 1/2 teaspoon crushed red pepper flakes
• Salt