01 - Bring a large pot of salted water to a rolling boil. Add penne pasta and cook according to package directions until al dente, about 10 minutes. Reserve 1/2 cup of the pasta water, then drain thoroughly.
02 - While pasta cooks, heat olive oil in a large skillet over medium heat. Add chopped shallot and sauté for 2 minutes until softened. Stir in minced garlic and red pepper flakes; cook for 1 minute until fragrant.
03 - Add tomato paste to the skillet. Stir well and cook for 2 to 3 minutes, allowing the paste to darken and caramelize slightly.
04 - Pour vodka into the skillet, stirring to combine. Simmer for 2 minutes to allow the alcohol to evaporate fully.
05 - Reduce heat to low. Pour in heavy cream, stirring constantly, until the sauce becomes smooth and creamy.
06 - Fold in grated parmesan cheese and stir until melted. Season with salt and freshly ground black pepper according to taste preferences.
07 - Transfer the drained penne to the skillet with sauce. Toss gently to coat pasta evenly; add reserved pasta water, a few tablespoons at a time, until sauce reaches desired consistency.
08 - Serve immediately in warmed bowls, garnished with chopped fresh basil and additional grated parmesan if desired.