I guess it may be difficult to find fresh sorrel leaves in many countries. Here in Poland many people cultivate sorrel in their gardens and you can easily buy it in spring in the markt. I am a huge fan of three most common edible Polygonaceae: buckwheat, rhubarb and sorrel. I lately learned a wonderful Russian recipe for sorrel patties, called Пироги с щавелем. They taste... well sourish, and neither sweet nor salty, it is that kind of meal that you can serve with cream or sprinkled with sugar (analogically: in Poland people eat placki ziemniaczane / latkes / raw potato pancakes sprinkled with sugar; in Ecuador people eat empanadas de viento / patties with cheese and onion filling sprinkled with sugar). So don't be afraid of adding sugar to the sorrel filling. Remember: sorrel mixed with sugar tastes like rhubarb! :)
400 gr curd cheese / twaróg
2,5 cups flour
1/2 teaspoon sodium bicarbonate
1/2 teaspoon salt
6 teaspoons sugar
4 tablespoons sour cream
80 gr butter (melted)
fresh sorrel leaves (about 400 gr) + sugar + few oil
1. Cut sorrel finely and place it in a bowl, sprinkle with few oil, cover and heat for 2 minutes in mictowave (sorrel will loose its fresh colour and reduce volume)
2. Press curd cheese through a sieve. Add sifted flour, sodium bicarbonate, salt, sugar, sour cream, melted butter and egg. Mix well.
3. Take a tomato-size ball of the dough, sprinkle with few flour just to be able to roll it. Put about 2 tablespoons of sorrel and 1 teaspoon of sugar on the top of rolled dough, hide the filling by closing the dough and form a croquette. Fry them and serve (possibly with sour cream or few sugar)
ps. they are DELICIOUS!!!!!