Beef Stew with Walnuts and Orange Zest

Ingredients

• 3 cups beef broth 
• 2 pounds beef chuck boneless cut into 1 1/2-inch cubes
• 2 stalks celery chopped
• 3 tablespoons flour all-purpose
• 1  onion chopped
• 1 tablespoon orange zest grated
• 4 servings salt and pepper 
• 3 tablespoons vegetable oil 
• 3 oz walnut pieces toasted

Equipment

• frying pan
• sauce pan
• slow cooker

Directions

1. Season beef lightly with salt and pepper; warm 2 Tbsp. oil in a large, heavy skillet over medium-high heat.
2. Add beef; brown on all sides, about 5 minutes. (Divide oil and cook in batches to avoid crowding, if needed.)
3. Transfer beef to a slow cooker; pour off all but 1 Tbsp. fat from skillet.
4. Add onion to skillet. Cook over medium-high heat until slightly softened, about 3 minutes. Stir in flour and cook for 2 minutes. (
5. Mixture will be dry.)
6. Add broth; bring to a boil on high heat, scraping up cooked bits.
7. Pour mixture over beef in slow cooker, cover and cook on high for 4 hours or on low for 6 hours.
8. Before serving, warm 1 Tbsp. oil in a saucepan over medium-high heat.
9. Add celery, walnuts and zest. Cook, stirring often, until blended, 3 to 5 minutes. Stir into stew.