Place the vine leaves in cold water for about 30 minutes, renewing the water from time to time. Soak the rice in warm water for about 30 minutes. Drain.
Peel and finely dice the onion and garlic. Heat butter and 1 tbsp. oil. Fry the minced meat in it until crumbly. Add onion and garlic and fry briefly. Steam the rice briefly. Season with salt, pepper and oregano.
Drain the vine leaves. Spread 4-5 leaves on the bottom of a wide pot. Then place 2-3 leaves next to each other, overlapping, and cover each with approx. 1 tbsp. rice mince filling. Fold over short sides and roll up firmly.
Place the rolls in the pot with the seam side down and close together.
Wash the lemon, cut into slices and place on top. Sprinkle with 2 tablespoons of oil. Bring 1/2-3/4 l water to the boil, dissolve stock in it. Pour on enough to cover the rolls well. Weigh down with a plate.
Bring to the boil, cover and cook for about 30 minutes. Leave to cool in the pot for about 1 hour, then lift out. Tsatsiki (Greek yoghurt dip) tastes good with it. Drink tip: beer, e.g. Keo.