Chicken Salad With Lemon, Raisins And Croutons

• 350 degree oven about
• 6 romaine leaves
• 6 radicchio leaves
• 3 times
• 3 sprays
• 2 stalks celery
• 1 lemon (finely grated)
• 270 gr chicken breasts
• 120 ml nonfat yogurt (plain)
• 80 ml mayonnaise (light)