Preheat oven to 425 F. Line baking sheet with foil; lightly coat with cooking spray. In bowl combine brown sugar and finely chopped pecans. Place apple halves, cut sides up, on baking sheet. Brush tops of apples with butter; sprinkle with brown sugar mixture. Bake 15 minutes or until just tender when pierced with a fork.
Meanwhile, in a screw-top jar combine oil, cider, vinegar, honey, salt, and pepper. Cover; shake well.
Arrange greens on serving platter; top with apple halves. Spoon melted sugar and pecans from baking sheet atop salad. Shake dressing; drizzle desired amount on salad. Sprinkle with coarsely chopped pecans. Pass remaining dressing. Makes 6 servings.