Hearty Irish Beef Stew

Name: Hearty Irish Beef Stew
Ingredients: 1 lb (454 g) Lean beef stew meat; 1 Medium Onion; 2 Medium carrots; 2 Stalks Celery; 3 Medium potatoes; 3 cups (255 g) Broccoli florets -Frozen; 1 can (284 ml) No salt added Sliced Mushrooms or 8 oz (240g) Fresh mushrooms; 1/2 cup (40 g) Rolled (Old-fashioned) or Quick-cooking Oats; 4 cups (950 ml) Soup stock or No salt added Broth -Any kind; 1/2 cups (120 ml) Red wine; 1 tbsp (15 ml) Worcestershire Sauce; 1 tsp Ground black pepper; 1 tsp Garlic powder or Granulated garlic; 1 tbsp Dijon mustard; 1/2 tsp Tarragon (dry); 2 Bay leaves; 1 tbsp (15 ml) Olive oil