Slow Cooker Beef Tips My Cozy Root Vegetable Stew

Ingredients

• 2 lbs (900g) beef stew meat or beef tips, cut into 1- to 2-inch pieces
• 1 tablespoon (15ml) olive oil
• 1 medium yellow onion, chopped
• 3 cloves garlic, minced
• 4 medium carrots, peeled and sliced into ½-inch chunks
• 3-4 medium Yukon Gold potatoes, cut into 1-inch pieces
• 2 celery stalks, sliced
• 1 cup (240ml) beef broth (plus more, if needed)
• 1 tablespoon (15ml) Worcestershire sauce
• 1 teaspoon (5g) kosher salt
• ½ teaspoon (2.5g) black pepper
• 1 teaspoon (2g) dried thyme
• 1 teaspoon (2g) dried rosemary
• 1 bay leaf
• 2 tablespoons (15g) cornstarch
• 2 tablespoons (30ml) cold water
• Fresh parsley, chopped