Soak the rice in a bowl with water for 1 hour then rinse it under running water in a strainer.
You can fry if you want for a few seconds the pine nuts in a frying pan over high heat then transfer to a small bowl.
Over medium heat place a pan with olive oil and saute the onion then add rice, parsley, dill and stir well then add water and let the rice cook.
When the rice is cooked set it aside and mix it with the pine nuts, add salt and pepper.
Place a pot over medium low heat with a few vine leaves at the bottom.
Lay the vine leaves on a flat surface and add a tsp of the mixture and fold the leave then roll it.
Place the vine rolls in a pot and add a plate on top to keep them from floating.
Add any other mixture left to the pot and add water to completely cover them and cook for 25-30 minutes.
In a small bowl stir well together lemon juice with cornflour then add it to the pot and add the olive oil. After a few minutes turn off the heat and remove the plate.