Start by seasoning the beef with salt and pepper, then toss in the flour, stirring to make sure all the beef is coated on all sides - this gives the meat a nice little crust when seared.
½ teaspoon each of salt and pepper (for seasoning meat), ¼ cup all purpose flour
Melt 2 tablespoons of butter in a pan over medium-high heat and sear the beef for about two minutes on each side.
2 Tablespoons butter
Remove the beef from the pan and reduce heat to medium-low.
Next, saute the onions in the same pan until they're soft and translucent, then add the garlic and saute for another 30 seconds.
1 medium yellow onion, chopped, 4 cloves garlic, minced
Splash in about a quarter-cup of the red wine (or beef broth) and scrape up all those browned bits from the pan. This is flavor magic.
Transfer the beef, onions, garlic, and all those tasty pan juices to your slow cooker.
In a separate bowl, whisk together the remaining red wine, beef broth, Worcestershire sauce, tomato paste, thyme, salt, and pepper. Pour that into the slow cooker too.
1 cup red wine (Cabernet Sauvignon, Merlot, or Pinot Noir), 3 cups beef broth, 2 Tablespoons Worcestershire sauce, 3 Tablespoons tomato paste, 1 teaspoon thyme, 1 teaspoon each salt and pepper
In a small cup or mug, stir the cornstarch together with a couple teaspoons of cool water, then stir that into the sauce in the crockpot.
2 Tablespoons cornstarch
Add your chopped celery, potatoes, carrots, parsley, rosemary, and bay leaves to the slow cooker. Give everything a good stir.
2 stalks celery, chopped, 4 carrots, peeled and chopped, 1 pound Yukon Gold potatoes, chopped, 1 sprig rosemary, 2 Tablespoons chopped parsley, 2 bay leaves
Cook on low for 8 - 10 hours or on high for 4 - 5 hours. Add peas in the last 15 - 20 minutes of cooking.
1 ½ cups frozen peas
Before serving, remove the bay leaves, give the stew one last stir, and sprinkle each serving with extra parsley.
Extra parsley for garnish
Serve with warm bread or biscuits and watch it disappear.