Dressing - Whisk together 1/4 cup olive oil, vinegar, and salt and pepper to taste. This can be done earlier in the day.
Preheat oven to 400°.
Line cookie sheet with aluminum foil.
Cut or break ends from asparagus and discard. Toss asparagus with a small amount of olive oil and salt and pepper. Place on cookie sheet in a single layer. Cook for about 12 minutes.
Just before serving, place arugula, basil, chives, walnuts and shallots in a large bowl. Toss with enough dressing to coat.
Season with salt and pepper and place salad on a large platter.
Top with roasted asparagus, pears and cheese and drizzle a little more dressing over the top.