Penne alla Vodka Recipe | Dinners | Umami

Ingredients

• 3 tablespoons (45g) unsalted butter
• 1 medium (8-ounce; 225g) yellow onion, diced
• 3 medium cloves garlic, thinly sliced
• Pinch red pepper flakes
• Kosher salt
• One 4 1/2-ounce (130g) tube concentrated tomato paste or 6-ounce (170g) can tomato paste
• One 14 1/2-ounce (411g) can whole peeled tomatoes
• 1 cup (240ml) heavy cream
• 1 pound (450g) short tubular pasta, such as rigatoni or penne
• 1/4 cup (60ml) vodka, plus more if desired
• 2 ounces (55g) grated Parmigiano-Reggiano, plus more for serving