Put the eggs, flour, sugar, soft butter, baking powder and the grated rind of one lemon into a food processor or a bowl and mix well into a smooth mass. We transform it into a pre-greased and flour-dusted rectangular mold or similar. Place in a preheated convection oven and bake for 30-40 minutes according to the program above. The time depends on the height of the mixture inside the mold. Before the end of baking, use a metal needle or skewer to check whether the loaf is cooked. Mix the juice of one lemon with granulated sugar until it dissolves and spread the hot loaf evenly with the mixture. Then let it cool, after which a crust should form on the surface. Cut into slices and serve ideally with the tea.