Perfect and Easy Chicken pot pie casserole 5 star

Ingredients

• 2 cups cooked chicken
• 2 cups mixed vegetables
• 1 small onion
• 2 cloves garlic
• 2 tbsp butter
• 2 tbsp all-purpose flour
• 1 1/2 cups chicken broth
• 1 cup milk
• 1/2 tsp salt
• 1/2 tsp black pepper
• 1/2 tsp dried thyme
• 1 can
• 1 egg