Healthy Chicken Pot Pie Soup

This Healthy Chicken Pot Pie Soup is comfort in a bowl! It's so easy, creamy and delicious—top it with puff pastry croutons!

• 2 tbsp olive oil
• 1 yellow onion diced
• 2 carrots peeled and diced
• 3 stalks celery diced
• 4 cloves garlic minced
• 1 tbsp flour optional, to thicken soup
• 1 medium-sized white potato chopped
• 1 lb chicken breast
• 3 sprigs fresh thyme finely chopped, or 1 tsp dried
• 1 sprig rosemary finely chopped, or 1 tsp dried
• 1 tsp fresh sage finely chopped, or 1 tsp dried
• 1/2 tsp salt
• 1/4 tsp pepper
• 4 cups chicken broth
• 1/2 cup milk dairy or non-dairy
• 1 cup peas
• 1 puff pastry sheet optional
• 1 egg