Penne alla Vodka with Shrimp

1.	Bring water to boil in large pot. Toss tomatoes with 1½ teaspoons salt and let drain in colander set over bowl for 5 minutes.
2.	Heat oil in nonstick skillet over medium heat until shimmering. Add tomato paste, garlic, and red pepper flakes and cook until fragrant, about 30 seconds. Stir in tomatoes and vodka and cook until slightly thickened, about 5 minutes.
3.	Season shrimp with salt and pepper, add to skillet, and cook until just opaque, about 3 minutes, stirring halfway through cooking. Add cream and cook until heated through, about 1 minute.
4.	Meanwhile, add penne and 1 tablespoon salt to boiling water and cook, stirring often, until al dente. Reserve 1 cup cooking water, then drain pasta and return it to pot. Stir in shrimp and sauce and ½ cup reserved cooking water. Simmer over medium heat, stirring until liquid is thickened and mostly absorbed, about 1 minute. Season with salt and pepper to taste, and add more reserved cooking water as needed to adjust consistency. Serve.