Lactose-Free Hearty Chicken and Leek Pot Pie - Milk

Ingredients

• 1 sheet thawed frozen puff pastry
• 1 tsp dijon mustard
• 1 egg, whisked
• 2 tbsp plain flour
• 4 boneless skinless chicken thighs, diced
• ¼ tsp dried thyme
• 3 russet potatoes, peeled and diced
• 3 cloves garlic, minced
• 1 leek, quartered lengthwise then thickly sliced
• 1 tbsp olive oil
• 2 cups chicken stock
• Salt and pepper
• 1 cup Ontario lactose-free whole milk
• 4 tbsp Ontario lactose-free butter