Penne alla Vecchia (Penne with Vodka Sauce)

A simple, easy to make pasta sauce.  It's basically this recipe, but I'm posting it here as I played with it a little.

1/4 C olive oil
2 small yellow onions, chopped
5 cloves garlic, minced
1/2 C parmesan, grated
2 28-oz cans of whole peeled san marzano tomatoes
1 C vodka
1 1/2 t dried oregano, plus another 3/4 t
2 t kosher salt
salt and pepper to taste
1 C cream
1/2 t crushed red pepper

Preheat the oven to 375 F.  Heat the oil and saute the onions and 3 cloves of the garlic; add in the crushed red pepper and the first 1 1/2 t of oregano and give it another minute.  Add in the vodka and reduce by half.

Hand crush the tomatoes into the pot, add 2 t salt and some pepper.  Cover the pot and put into the oven for 1 1/2 hours.

Remove, allow to cool slightly, then add the rest of the garlic, the cream, and the rest of the oregano.  Blend until smooth.  Add in the parmesan, simmer gently for a few minutes, then adjust the seasoning as necessary.  Serve on top of al dente penne pasta.