Peel and finely slice the shallots. Peel the potato and cut it into small (1cm) cubes.
Add the butter to a large saucepan and place on a medium heat. Once melted, add the potatoes and shallots and fry for 3-4 minutes.
Pour in the vegetable stock, bring to a boil then simmer for 5-10 minutes until the potato chunks are cooked through. The bigger the chunks, the more time they will need.
Once the potato is cooked, add the watercress and frozen peas and mix well. Simmer for another 3-4 minutes.
Turn off the heat, add the crème fraîche and then blend using a stick blender, or pour into a jug blender and blitz until smooth. Season to taste with salt and pepper then serve straight away.
Notes
Storage: This Watercress Soup recipe can be refrigerated and reheated to eat - or frozen. Heat straight from frozen for an easy meal.
Step-by-Step Photos: Check out the blog post above for step-by-step photos of this method if you find it easier to follow a visual guide. There’s also a video in this recipe card for you to follow if that’s easier.
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