Penne with Vodka Sauce

Matt loves Penne with Vodka Sauce, so when I find a new recipe I want to try it to see if it is yummier than what we are currently eating. This is from the Celebrity Italian Cookbook, from Barilla Pasta.

4 tablespoons extra virgin olive oil

1 medium red onion, cut into ¼ inch dices

½ cup vodka

2 cups Basic Tomato Sauce

1 cup heavy cream

1 pound Barilla Penne

1 cup Parmigiano Reggiano cheese, grated, plus a piece to grate fresh

Bring 6 quarts water to boil and add salt to taste.
In a large sauté pan, heat oil over medium heat until just
smoking. Add onions and cook until light golden brown, about
6 to 7 minutes. Add the vodka and cook until liquid is reduced by
half, about 4 to 5 minutes. Add the tomato sauce and the cream
and cook until the sauce has reduced by a third, about
10 minutes.
Meanwhile, cook the Barilla Penne in the boiling water for
1 minute less than the package directions indicate. Drain the
pasta and add it to the saucepan. Stir together over very high
heat for 1 minute, until thoroughly coated. Remove pan from
heat, add grated Parmigiano cheese and toss for 20 seconds to
mix well. Divide the pasta among four bowls, grate Parmigiano
Reggiano cheese over each bowl and serve immediately.