Wash and drain the parsley and, except for something to garnish, pluck the leaves from the stalks. Bring a pot of salted water to the boil. In the meantime roast chopped almonds in a pan without fat, take them out.
Blanch parsley for about 30 seconds and quench. Squeeze out the parsley and put it with oil in a universal chopper. Add lemon juice and vinegar. Season to taste with salt, pepper and sugar.
Stir the almonds into the pesto. Garnish with flaked almonds and parsley.