Finely grate the parmesan. Peel garlic and chop finely. Mix half each with mayonnaise, yoghurt and lemon juice. Season with salt and pepper. Clean, wash and cut the salad into strips.
Cut bread into strips. Mix the rest of the garlic and oil. Drizzle bread with it. Grill briefly on each side until crispy. Then break into several pieces.
Wash duck breasts and pat dry. Make several light cross incisions in the skin. Season with salt and pepper and grill for 10 minutes on the skin side. Turn and grill for another 5-10 minutes.
Mix salad, bread and sauce. Sprinkle the rest of the Parmesan cheese on top. Arrange slices of duck breasts on top.