Penne with Vodka Sauce

Why I Love This Recipe
I know this is a lot of sauce it can be halved pretty easily. I made this for a big group and my brother's gf watched and wrote down what I did.
This is enough sauce for about 4-5 lbs of pasta or more.
The picture was taken before the cream was added.
Ingredients You'll Need
2 onions, chopped
1 bunch scallions, chopped, (separate light and dark green parts)
5 cloves of garlic, chopped
Extra virgin olive oil
1/4 lb Prosciutto di Parma, sliced and cut into squares
1 1/4 cup vodka
2 cans tomato paste
4 cans crushed tomatoes
1 Qt heavy cream
Kosher salt
Black pepper
Directions
Preparation
In a large saucepan, sauté onions, garlic and light parts of scallions until soft on medium heat. Add Prosciutto and let cook for about one minute. Add vodka; turn up heat to medium high and cook until alcohol burns out about 4 minutes. Lower heat and add tomato paste and crushed tomatoes; stir. Add green parts of scallions, kosher salt and black pepper. Turn up heat until boiling, then lower heat. Let cook for 1 hour. Add cream; let simmer until starts bubbling and turn off heat.
This is enough sauce for about 4-5 lbs of pasta or more.
Questions, Comments & Reviews
I swear I will get to writing mine down soon! :)