Mario Batali's Tomato Sauce

I got this recipe off of FoodNetwork.com

• Ready In: 45 mins
• Serves: 6
• Yields: 6 cups

Ingredients

• 1⁄4 cup  extra-virgin olive oil
• 3  red onions, thinly sliced
• 1  head garlic, thinly sliced
• 1  tablespoon  red chili pepper flakes
•  salt and pepper
• 1  sprig fresh rosemary
• 2  cups red wine
• 1 (16 ounce) can san marzano tomatoes, and their juices crushed by hand
• 1⁄2 bunch Italian parsley, roughly chopped

Directions

1. In a large oven-proof skillet, heat the olive oil over high heat. Add the onions and garlic and cook over medium heat until well browned. Add the chili flakes and salt and pepper, to taste. Add the rosemary and red wine and stir until the wine is reduced by half. Add the tomatoes and simmer for 15 minutes.