If you are using frozen shrimp, thaw and set aside.
Chop 1/2 medium yellow onion and set aside.
Mince 3 cloves of garlic.
Heat 1 tbsp olive oil in a large skillet over medium-high heat.
Add the chopped onion and cook until soft and translucent, 3-4 minutes.
Add the minced garlic, oregano, and crushed red pepper flakes, and cook, stirring, until fragrant, 1-2 minutes.
Pour in the crushed tomatoes and stir.
Add the tomato paste and stir in until fully combined.
Sprinkle in the sugar and stir.
Reduce to medium heat.
Pour in the vodka and stir.
Add the heavy cream in a slow stream, stirring constantly.
Lightly salt and pepper according to your taste. Remember to start small.
Let the sauce simmer gently (do not boil) while you prepare your pasta.
Prepare the pasta according to package directions. You will use about 3/4 of a 12 oz box.
About 5 minutes before the pasta is ready, add the shrimp to the simmering sauce and toss to combine.
Cook the shrimp until they are completely pink, about 5 minutes.
Drain the pasta. Add the drained pasta directly to the pan with the sauce and toss, or serve separately and spoon the shrimp alla vodka sauce over the pasta.
Finish with a sprinkle of shredded or grated parmesan cheese.