Sear meat: Season beef pieces on all sides with salt and pepper. Add oil to a large cast iron pot over medium heat-high heat. Once hot, add steak, in small batches, and brown on all sides. Don’t crowd the meat in the pan or it will steam instead of sear. Set aside the seared beef onto a plate.

Cook sauce ingredients: Add a little more oil to the pan, if needed and reduce heat to medium. Add onions and cook until golden. Return the meat back to the pot, along with tomato sauce, bouillon cubes, water, paprika and vinegar.

Simmer: Cover pot, reduce heat to low and simmer for 2 hours, until meat is fall apart tender. Remove from heat and allow to cool for 10 minutes, then stir in the sour cream. Taste and add additional salt and pepper, as needed.

Serve: Boil noodles according to package instructions and serve pörkölt over them.