Blanch the beans and asparagus tips by boiling for 3 minutes in boiling salted water, and then rinse under cold running water. Mix the Cocovite scrambled egg mix with the shredded mackerel and add the flat-leaf parsley. Mix thoroughly and season with salt and pepper. Spread the sheets of puff pastry into two terrine moulds. Pour in a layer of the fish mixture. Top with some of the vegetables and repeat until you have used up all the ingredients. Fold the puff pastry closed and brush with a small amount of the Cocovite scrambled egg mix. Bake for 35 minutes at 180°C.