Heat the olive oil in a large skillet on medium-high heat.
2 tablespoons olive oil
Add the meat and sear for just 1 minute on each side to lock in the juices. Cook in batches if necessary being sure not to crowd the pan.
2 pounds beef stew meat, Salt and pepper
Place the seared beef to the slow cooker and add the onion, garlic, mushrooms and thyme.
1 small onion, 8 ounces mushrooms, 1 teaspoon fresh thyme, 2 cloves garlic
Add the Worcestershire sauce and beef broth.
1 ½ cups beef broth, 2 teaspoons Worcestershire sauce
Cover the slow cooker and cook on low for 6-7 hours or high for 4-5 hours until beef is tender and shreds easily.
Spoon out the beef and place it in a bowl.
Stir in the sour cream with sauce in the slow cooker and stir to combine well.
1 cup sour cream
Add the beef back into the sauce and toss to coat.
Serve over egg noodles or mashed potatoes.