Pork Tourtière

Ingredients

• 1 Tbsp / 15 mL canola oil
• 1 ½ lb / 0.75 kg lean ground pork
• 1 cup / 250 mL finely chopped yellow onion
• ½ cup / 125 mL finely chopped celery
• 2 cloves garlic, minced
• 1 ½ cups / 325 mL beef broth
• 1 tsp / 5 mL Worcestershire sauce
• ½ tsp / 2 mL dried thyme leaves
• ½ tsp / 2 mL EACH salt and ground black pepper
• ¼ tsp / 1 mL EACH ground allspice and ground cinnamon
• 1 pinch ground cloves
• 1 bay leaf
• 1 large russet potato, baked, peeled and coarsely mashed
• Pastry for 9-inch double-crust pie*
• 1 egg yolk
• 1 tsp water