Veal with potatoes

600 g boneless veal steaks 2 tablespoons olive oil 80 g butter 200 g mushrooms (white) 1 garlic clove 1 teaspoon lemon zest 1 tablespoon lemon juice 1[...]

2 tablespoons all-purpose flour , plus 3/4 teaspoon all-purpose flour 1 1/4 teaspoons salt 1/8 teaspoon ground black pepper 4 veal shanks 1 tablespoon butter[...]