Citrus Grain Salad

• 2 naval oranges
• 1 orange zest (grated)
• 475 gr grains (cooked)
• 130 gr carrots
• 65 gr celelry
• 55 gr raisins
• 45 ml lemon juice
• 30 ml olive oil
• 28 gr safflower
• 16 ml wine vinegar