Step 1: Sear the Meat - In a skillet over medium-high heat, sauté chopped onion until translucent, about 3–4 minutes. Add beef stew meat and sear until browned, about 5–7 minutes. Transfer to crock pot.

Step 2: Mix Sauce - In a mixing bowl, combine milk, cream of mushroom soup, Worcestershire sauce, and cream cheese. Mix until smooth. Add sour cream and fresh mushrooms if using.

Step 3: Combine - Pour sauce over seared beef and onion in crock pot. Stir to ensure meat is coated.

Step 4: Cook - Cover and cook on low for 4 to 6 hours. Stir occasionally if home.

Step 5: Prepare Noodles - About 15 minutes before serving, cook egg noodles according to package instructions. Drain and set aside.

Step 6: Serve and Enjoy - Let sit for 5 minutes in the crock pot, then ladle onto plates. Serve hot with garlic bread or parsley.