Easy Vodka Sauce

Bahan-bahan (4 porsi)

• 28 ounces canned whole tomatoes (with juices, 1 can)
• ½ small onion (finely diced)
• 1 tablespoon olive oil (or butter)
• 4 ounces pancetta (chopped, or bacon ½-inch dice)
• 4 cloves garlic (minced)
• ⅓ cup vodka
• 14 ounces crushed tomatoes
• ½ teaspoon red pepper flakes
• 1 cup heavy whipping cream
• ⅓ cup shredded Parmesan cheese (or romano cheese)
• 3 tablespoons chopped fresh parsley