Once you've got hold of the sorrel, either by foraging or by buying some in an online shop like this one, the soup is very simple to make. It tastes just like the one my Babcia Ziuta used to make, yet the recipe comes not from her but from this lady's grandma
That's the lady who sold us the sorrel at the market. We always wash the sorrel thoroughly first. Fry it in a large knob of butter until it wilts. Allow it to cool for about 20min, then blend. The old method is to push it through a sieve with a wooden spoon, but blending is much easier, so I suggest to do that. Put it in the biggest pan you can find and fill half-way with cold water. Bring to the boil, then turn the heat down and simmer for half an hour. Near the end of the cooking time, we season the soup with salt and pepper and thicken with plain flour, stirring all the time. Bring it back to the boil for 5min, allowing the flour to do it's job.
Before adding the yoghurt, we allow the soup to cool down a little bit again, for about 20-30min. The lady's grandma would have used thick cream rather than yoghurt I expect but the lady uses yoghurt and it works very well. Not to mention being healthier. So you do it like this: put the yoghurt you intend to use in a large cup and add a tablespoon of soup, stir it in. Add another tablespoon and stir it in. Repeat about 5 times. Finally, pour the whole thing into the soup and stir vigorously. Heat the soup a little before serving. Hard boiled eggs inside each bowl are a necessary addition, the potatoes with dill are optional but highly desirableIngredients
1 large bag of sorrel
50g butter
3 tablespoons flour
150ml greek yoghurt
Salt and white pepper
Hard boiled eggs