Easy Irish Potato Soup

Heat the butter in a 3-quart saucepan over medium heat. Add the celery and onions and cook until they're tender, stirring occasionally.

Stir the broth, water, black pepper and potatoes in the saucepan and heat to a boil. Reduce the heat to low. Cover and cook for 15 minutes or until the potatoes are tender. Remove the saucepan from the heat.

Place half the broth mixture and 3/4 cup milk into a blender or food processor. Cover and blend until the mixture is smooth. Pour the mixture into a medium bowl. Repeat with the remaining broth mixture and milk.

Return the broth mixture to the saucepan and cook until the mixture is hot and bubbling, stirring occasionally. Sprinkle with additional sliced green onions, if desired.