Step 1Combine walnut oil, olive oil, vinegar, shallots, salt and pepper and shake in a covered container until thoroughly blended. Makes 3/4 cup.
Step 1Toast walnuts in shallow pan at 350 degrees until walnuts smell fragrant and are lightly browned, about 5 minutes. Let cool.
Step 2Arrange romaine on platter or in salad bowl. Place sliced pears in separate bowl and squeeze lemon juice over top. Gently toss to coat, then arrange pears on the romaine. Sprinkle with toasted walnuts and cheese. Drizzle salad with vinaigrette.