Soak gelatine in plenty of cold water. In the meantime, simmer milk and 150 g sugar until the sugar has dissolved. Season to taste with bitter almond flavour and let cool off lukewarm. Squeeze the gelatine well. Dissolve in the lukewarm milk.
Rinse a suitable casserole dish (approx. 20x25cm) in cold water and line with cling film. Pour in almond milk and let it cool down overnight. Simmer 1/8 litre water and remaining sugar for about 5 minutes. Turn out the jelly, cut it into rhombuses as desired and serve sprinkled with the sugar water