Roasted Red Pepper Penne alla Vodka

Mise en place - Peel and chop the onion into a fine dice. Mince the garlic. Pat the roasted red peppers dry, then give them a rough chop. Peel and devein the shrimp, removing the tails. Mince the parsley. Put on the pasta water.
Begin the sauce and drop the pasta - Add the oil to a skillet and heat over medium/low heat. Once hot, add the diced onion and sauté until translucent and lightly browned. Add the garlic and sauté for 1-2 more minutes. Pour in the vodka and simmer until the liquid has cooked off. Add in the tomato paste and sauté for a couple minutes. Take the skillet off of the heat. Drop the pasta into boiling, salted water and cook according to package directions.
Blend - While the pasta is cooking, add the onion mixture to a blender along with ½ cup evaporated milk, ¼ cup water, roasted red peppers, 1 t salt, 2 t red pepper flakes, and ½ cup grated Parmesan. Blend until completely smooth then return to the skillet.
Finish - Turn the heat up to medium. Add the shrimp to the sauce and gently simmer, covered, until the shrimp are opaque, beginning to curl, and cooked through. Turn off the heat.
Garnish and serve - Pour the shrimp and sauce over the cooked and drained penne, and garnish with chopped parsley leaves. Serve with more grated Parmesan at the table.