First, bring a large pot of water to a boil. Add salt, and then add the pasta. Set a timer and cook the pasta accrording to package directions. (The vodka sauce should cook in the same amount of time as the pasta!) Also: be aware that you need to save some pasta water before draining the pasta!
In a medium skillet, heat the olive oil over MEDIUM heat. Add the garlic and saute for 30 seconds.
Add the red pepper flakes, and saute for 10 seconds.
Next, add the entire can of tomato paste. Break it up with a spatula or wooden spoon as it cooks.
Turn the heat OFF, and add the vodka. Stir to dissolve.
Turn the heat back on to LOW, and then add the cream, salt and pepper. Stir to combine and taste—add more salt and pepper, if desired.
When the pasta is done cooking, ladle it into the pan with the sauce, saving some pasta water. Stir, and add splashes of pasta water until the mixture is smooth and creamy.
Grate a decent amount of Parmesan cheese on top, and serve in 2 bowls.