Vodka Sauce (ala Carolyn)

Why I Love This Recipe
This was given to me by a friend. So simple and soo yummy!
Ingredients You'll Need
1 Stick Salted Butter
3/4 cup finely chopped onions
3/4 cup finely chopped celery
2 cans chicken broth
2 cans tomato paste
handful grated parm cheese
dash salt
dash pepper
red pepper flakes (to taste)
1 pint heavy cream
Shot vodka (optional)
Directions
Over medium heat, combine celery and onion with butter and sautee about 5 minutes (or until the celery/onion get soft).
Add broth and tomato paste and bring to a boil (about another 5 minutes). You might want to lower heat a bit now.
Add grated cheese, salt, pepper and red pepper flakes to taste.
Finally add cream and blend together.
Whole process for me takes about 15 minutes (about the time for the pasta to be completely cooked).