German Potato Soup

Why I Love This Recipe
This cookbook is from a cookbook my 10th grade German class made. I think it's delicious (obviously):
Ingredients You'll Need
1 1/2 lbs. potatoes
2 Tbsp butter
1 onion diced
2 carrots diced
3 celery stalks diced
4 c. water
4 bouilion cubes
salt & pepper
Directions
Peel potatoes and cut into cubes. Melt butter and saute potates, onions, carrots and celery for 10 minutes. Add water and bouilion cubes and simmer for 30 minutes. Season with S & P.