Put the veal cubes in a bowl, season with salt and pepper then coat them with half of the cornflour.
Heat half of the oi and brown the veal all over then place them on a plate.
Heat the remaining olive oil, then add the wine and lemon juice and reduce it by half.
Add the stock and lemon slices and bring to a boil. Cook for 5 minutes until it reduces, then add the beans and capers. Cook for another 3-5 minutes, then take a spoonful of the liquid into a small bowl, and mix it with the corn flour.
Stir this paste into the stew, then let the sauce thicken.
Put the meat back, add the sage and cook for 3 minutes under cover.
Serve with the chopped parsley scattered on top.