Cut prosciutto or bacon into small pieces. Melt butter and saute prosciutto and garlic until lightly browned. Add tomatoes, pepper flakes and salt and cook for 1 hour stirring occasionally. Keep partially covered so that the sauce can reduce.
When sauce has reduced to about half, add heavy cream and vodka, bring to a boil, stirring constantly. Simmer for 1/2 hour and serve over Penne, Rigatoni, or other "shaped" pasta.