Bring water, sugar and vinegar essence to a boil and cook for 5 min. Cut the melon into wedges, remove the seeds and cut the flesh into pieces. Clean and sort out the raspberries. Put fruits and almond kernels in a bowl form, pour sugar solution over it and let it infuse for about 2 hours.
Cut pork into cubes, peel onions and cut into wedges. Thread alternately onto skewers. Heat oil in a frying pan and roast the skewers in it for about 8 minutes. Season with salt and pepper.
Arrange the skewers with the pickled fruit on plates. Garnish with lemon slices and lemon balm.
Serve with: fresh baguette