Osso Buco ***

• 6 garlic (cloves)
• 2 onions
• 1 zest of two lemons (grated)
• 1,600 gr veal shank
• 525 gr tomatoes (plum)
• 475 ml beef stock
• 475 ml dry wine (white)
• 130 gr all purpose flour
• 55 gr butter
• 60 ml olive oil