Potato Cheese Soup

(Courtesy of mrfood.com)

Ingredients:
2 Tbsp. butter
1 celery stalk, finely diced
1 small onion, finely diced
1 3/4 c. chicken broth
3 large potatoes, peeled and diced
2 tsp. white vinegar
3 Tbsp. all-purpose flour
2 1/2 c. milk
1/4 tsp. salt, plus additional to taste
1 tsp. black pepper
2 c. (8 oz.) shredded Cheddar cheese

Directions:
In a soup pot, melt butter over medium-high heat. Add celery and onion, and saute 5 to 7 minutes, or until tender.

Add chicken broth, potatoes, and vinegar; cover and bring to a boil. Reduce heat to low and simmer 20 to 25 minutes, or until potatoes are tender.

Add flour, milk, salt, and pepper; cook until soup is thickened and heated through, stirring constantly. Add cheese and stir until melted. Taste for salt, adding more if necessary. Serve immediately.