Creamy Potato Soup

peeled and diced Russet potatoes ((about 5 medium potatoes. Dice into small cubes about 3/4-inch))

chopped yellow onion (1 medium

peeled and diced carrots ((3 medium))

diced celery ((2 stalks))

low sodium chicken broth

Salt and freshly ground black pepper

butter

all-purpose flour

milk

sour cream

For serving:

Crumbled bacon or chopped cooked ham (, shredded cheddar cheese, chopped green onions or chives)