Preheat the oven to 325 F.
Trim the beef chuck and cut into 1.5 inch large cubes. Season with salt and pepper and then coat very well with the flour.
Brown the Beef: Heat olive oil in a Dutch oven over medium-high heat. Sear in batches until browned. Do this in batches so you don't over crowd the pan. Remove beef and set aside.
Sauté the Aromatics: In the same skillet, sauté the onions and garlic then add in tomato paste, seasoning, salt and pepper. Add beef back into the pan and sauté for a few more minutes.
Add beef broth, Worcestershire sauce, bay leaves, and ginger. Bring to a simmer, cover, and cook in the preheated oven for 1.5 hours.
Add in the potatoes, carrots, green peas, celery, and jalapeno pepper. Submerge all the ingredients in the liquid. Cover and bake for another hour. Taste for salt.
At 1.5 hours, remove the lid safely and add in the carrots, potatoes, peas, celery and Jalapeño if you're using any. Cover and cook for 45 more minutes.
Add in the mushrooms, cover and cook for another 10 minutes.
Once 10 minutes has passed, add in the flour slurry and mix well. Cover and turn off the oven. Allow the beef stew to rest for 10 more minutes in the oven before serving. Garnish with fresh chopped parsley.