For croutons, lightly coat a shallow baking pan with nonstick cooking spray. Stir together 1 teaspoon of the olive oil and the water in the prepared pan. Add bread cubes and toss to coat. Sprinkle with salt and pepper; toss to coat. Bake in a 400 degree F oven for 10 to 15 minutes or until browned, stirring once. Remove and cool in pan on a wire rack.
Meanwhile, for dressing, in a blender container, combine the remaining oil, 2 tablespoons of the Parmesan cheese, the vinegar, onion, garlic, capers, mustard, the 1/8 teaspoon pepper, and the 1/8 teaspoon salt. Cover and blend until nearly smooth.
Place romaine in a large salad bowl. Sprinkle with pepper. Add the dressing and toss to coat. Sprinkle with remaining Parmesan and the croutons. Makes: 4 to 6 side-dish servings.