For the cream, soak gelatine in cold water. Wash the lime in hot water, rub dry. Peel the rind thinly with a zest ripper. Squeeze juice out of 1/2 lime. Use the other half for other purposes. Squeeze the gelatine well and melt it in 2 tbsp. soured milk in a pot at low heat while stirring. Stir in the remaining soured milk. Pour into a bowl and whisk with cream cheese, agave syrup, lime juice and zest, except for something to decorate, for 2-3 minutes until creamy. Cover the cream and put it in a cool place
Take the puff pastry out of the fridge 5-10 minutes before use, roll it out and cut it in half from the long side. Use one half for other purposes. Cut the other half into 10 large rectangles (approx. 5 x 9.5 cm). Place on a baking tray lined with baking paper. Leave a distance of about 1 cm between each piece. Whisk the egg yolks with 2 tbsp. water. Brush the dough pieces with it. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for approx. 8 minutes until golden brown. Let them cool down on a cake rack
In the meantime, quarter the melon. Remove seeds. Use a small ball cutter to cut 50 balls from the flesh. Use the rest of the melon for other purposes. Cut the puff pastry in half horizontally. Pour the cream into a piping bag and squirt it onto the lower puff pastry bases. Place 5 melon balls on each base, spray some cream on top and place the upper bases on top. Decorate the slices with icing sugar and lime zest