Easy Biscuit Chicken Pot Pie

Bahan-bahan (4 porsi)

• 2 cups frozen vegetables
• 1 ½ cups cooked chopped chicken
• 10.5 ounces condensed cream of chicken soup (1 can , 10.5 oz each)
• ¼ teaspoon poultry seasoning
• salt and pepper to taste
• ¾ cup milk (divided)
• 1 cup biscuit mix (such as bisquick)
• 1 egg