To make the salad dressing, put the vinegar, whole grains and Dijon mustard in a bowl and mix with a hand-held blender. Pour the olive oil in a steady stream, blending continually until the dressing reaches a thick consistently. Add the honey.
Place the salad leaves into a large bowl and pour in a little of the dressing. Mix to ensure all the leaves are covered then add the peaches, pears and mozzarella.
Divide the salad into 4 bowls and arrange Parmesan shavings on top of each drizzle with a little more dressings and serve.