Perfect for left-over ham

This recipe was so yummy! It was the perfect week for soup since it was freezing last week so, I thought I would try it out and I LOVED it!
The recipe is from allrecipes.com- I changed it a little so here is my version.

Delicious Ham and Potato Soup

INGREDIENTS
3 1/2 cups peeled and diced potatoes
1/3 cup diced celery (optional)
1/3 cup finely chopped onion
3/4 cup diced cooked ham
2 cans of chicken broth
1/2 teaspoon salt, or to taste
1 teaspoon ground white or black pepper, or to taste
pinch of minced garlic
5 tablespoons butter
5 tablespoons all-purpose flour
2 cups milk
1 c. shredded cheese

DIRECTIONS
Combine the potatoes, celery, onion, ham and chicken broth in a stockpot. Bring to a boil, then cook over medium heat until potatoes are tender, about 10 to 15 minutes. Stir in garlic, salt and pepper
In a separate saucepan, melt butter over medium-low heat. Whisk in flour with a fork, and cook, stirring constantly until thick, about 1 minute. Slowly stir in milk as not to allow lumps to form until all of the milk has been added. Continue stirring over medium-low heat until thick, 4 to 5 minutes. Stir the milk mixture into the stockpot, and cook soup until heated through. Add cheese and stir until cheese is melted.