01 -  Heat oil in a large Dutch oven on high heat. 
 02 -  Season chuck roast with kosher salt and black pepper. Brown meat on all sides, 4-5 minutes on each side. 
 03 -  Add the beef to the slow cooker with onions, mushrooms, and garlic. 
 04 -  Whisk together beef broth, Dijon mustard, Worcestershire sauce, thyme, and paprika. Pour into the slow cooker. 
 05 -  Cook on low heat for 8 hours or on high heat for 4 hours. 
 06 -  Remove meat from the slow cooker and gently break apart with two forks. 
 07 -  Cook egg noodles just a minute shy of package instructions. 
 08 -  Mix sour cream into the sauce and add in the egg noodles, stirring to coat. 
 09 -  Top with the chuck roast and cook on high for 15 minutes.