Step 3: Sauté the Onion
In the same skillet, add the diced onion and cook for about 2 minutes, scraping up any browned bits for extra flavor. Transfer the onions to the slow cooker.
Step 4: Deglaze the Pan
Pour the Worcestershire sauce, water, and beef demi-glace into the skillet. Whisk to combine, scraping the bottom to release any remaining flavor. Once mixed, remove from heat and set aside.
Step 5: Add Vegetables
To the slow cooker, add diced potatoes, sliced carrots, celery, and bay leaves on top of the meat and onions.
Step 6: Combine Everything
Pour the Worcestershire-broth mixture from the skillet over the contents of the slow cooker.