Zupa Koperkowa

===Ingredients===
 * 15g unsalted butter
 * 1 tbs fresh dill, chopped
 * 500ml beef stock
 * 1/2 tsp lemon juice
 * 150ml sour cream
 * salt and pepper

Directions
Melt butter in pan, add dill and stir gently over low heat for a few minutes. Heat stock and add the dill to it. Mix in the lemon juice and cream. Season and serve. Serves 2.