Bramborova Polevka(Potato Soup) - cooking recipe

Ingredients

2 lb. boiling potatoes
6 Tbsp. butter
1 c. chopped celery
1/4 c. diced parsnips (1/2-inch dice)
2 Tbsp. flour
1 qt. chicken stock
1/4 tsp. marjoram
1/2 tsp. black pepper
1/2 c. chopped mushrooms (fresh or dried)*

Preparation

*Dried mushrooms should be soaked and drained.