Take small walnuts, wash them and place them in a saucepan with water. Boil them until they soften well. Remove them from the hot water and pour into a bowl with plenty of cold water. Let them in the water for 48 hours, changing it every 8 hours. Boil the sugar with the water for eight minutes. Drain the nuts, put into each of the wallnuts a marzipan and boil for another 5-7 minutes. Remove the pot from the heat and let the nuts stay in the syrup for 24 hours. Return the pan to the heat and cook it in high heat. Skim and after it ties properly add the lemon juice and the vanilla. Allow it to take 1-2 boils and put it away. When it is half cold put the sweet in jars.