Green beans with sour cream

Description
In Romanian: Fasole verde cu smantana.

Ingredients

 * 2 lbs/1 kg green beans,
 * 1 tablespoon butter,
 * 1 cup sour cream,
 * salt

Directions

 * 1) Simmer for a few minutes, shaking the pan so that the beans are well mixed with the butter.
 * 2) Place the beans on a plate and pour the sour cream on top. Serve immediately.