Shred the zucchini, sprinkle with a little salt and transfer to a colander to drain. (I put my colander on a plate to catch the liquid).
Heat the oil in a medium, heavy bottomed pot with a pinch of red pepper flakes.
Stir in the onions and saute until they just start to change color.
Add the potato and vegetable broth.
Season and adjust the heat until the broth is just below a boil.
When the potatoes are nearly cooked through, add the shredded zucchini, discarding any juices that may have collected. Simmer for five more minutes or until the vegetables are cooked through.
Use a stick blender to puree the vegetables. Season with salt, pepper and thyme.
Reduce the heat, then stir in the cream. Add more broth if needed to adjust the thickness of the soup.
Serve warm or if you prefer, cool the soup in the fridge. The fats will separate as the soup cools, Stir them back in before serving.