For the croutons: Place a grill pan over medium-high heat or preheat a gas or charcoal grill. Brush the bread on each side with olive oil. Grill until grill-marked and golden, 1 to 2 minutes each side. Cool slightly and cut into 3/4-inch cubes. For the dressing: In a small bowl, whisk together the oil, wine, honey, mustard, salt and pepper until smooth.
For the salad: Place the raddichio, arugula, pear slices, walnuts and croutons in a large bowl. Add the dressing and toss until coated. Using a vegetable peeler, shave the Parmesan on top and serve.
To toast the walnuts, arrange in a single layer on a baking sheet. Bake in a preheated 350 degrees F oven for 6 to 8 minutes until lightly toasted. Cool completely before using.