Creamy mushroom soup

When I want a change from borscht, I make this creamy mushroom soup. It needs few ingredients and little time. Use water for a lighter soup or chicken broth for a richer one.
Adjust servings in the full version
The soup turns out quite liquid. If you want a thicker consistency, simply reduce the amount of liquid.
The calorie content of the soup is based on chicken broth.
Place the undefrosted champignons in the pan with the onions. Evaporate the water. And fry until golden.
When the potatoes are tender, add the fried mushrooms and onions. Season with salt if using water. Bring to a boil, then remove from the heat and puree with an immersion blender, or transfer to a jug blender.