Wash the lemons hot, grate the peel thinly, halve the lemon, squeeze the juice. Mix 250 g butter, lemon peel of 1 1/2 lemons and 100 g sugar with the whisks of the hand mixer until creamy. Stir in eggs one after the other. Mix 300 g flour and baking powder and stir in alternately with lemon juice of 1 1/2 lemons
Peel melon, remove seeds with a spoon and cut melon into small pieces. Mix melon pieces with 1 tbsp. flour and stir into the dough. Grease a box form (approx. 2 litres capacity) and dust with flour. Fill in the dough and smooth it down
Knead 50 g butter, 50 g sugar, 100 g flour and egg yolk into crumbles. Knead cornflakes into the crumble mixture and spread on the dough. Bake the cake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 70 minutes (test with sticks). If necessary, cover with foil after approx. 50 minutes
Take out the cake, let it cool down for about 15 minutes and carefully turn it out of the tin. Let the cake cool down on a cake rack. Stir 1-2 tablespoons lemon juice, 1 tablespoon cold water, lemon peel of 1/2 lemon and icing sugar to a smooth glaze. Spread the icing over the cake with a tablespoon
waiting time approx. 2 hours