In a large pan, melt the butter over medium heat. Add the onions and garlic. Cook over medium heat, until softened, about 4 minutes. Add the tomato paste and brown (about 2-3 minutes). Stir frequently.
Add Chianti and worcestershire sauce to the pan and deglaze. Scrape up any bits stuck to the pan. Increase the heat and bring to a boil, then reduce the heat to low. Simmer for 8 minutes.
Add the brisket and sour cream to the sauce. Stir to combine. Continue to cook on low for heat for five minutes. Pour the sauce over cooked egg noodles and top with chopped parsley. Serve warm.