Chicken Potpie Soup

Bahan-bahan (6 porsi)

• One pie crust, (uncooked (homemade or store-bought))
• 1 tablespoon milk, (for brushing)
• salt and pepper, (as desired)
• ¼ cup (½ stick) salted butter
• 1 large onion, (chopped)
• 3 large carrots, (chopped)
• 3 large celery ribs, (chopped)
• 4 medium Yukon Gold potatoes, (cut into ¾-inch cubes)
• 2 large garlic cloves, (minced)
• ⅓ cup all purpose flour
• 1 teaspoon fresh thyme leaves ((or sub ½ teaspoon dried))
• 6 cups chicken broth, (plus more as needed)
• 1½ cups frozen peas, (thawed)
• 2 cups shredded fully cooked chicken ((can sub turkey))
• 2 cups half and half cream
• 1 tablespoon freshly squeezed lemon juice
• fresh thyme sprigs, (for garnish)