Prep: 3 minutes; Cook: 10 minutes
1. Preheat broiler.
2. Sprinkle lamb evenly with 1/4 teaspoon salt and 1/4 teaspoon pepper. Arrange lamb in a single layer on a broiler pan coated with cooking spray; broil 5 to 6 minutes on each side or until desired degree of doneness.
3. While lamb broils, grate 1 teaspoon lemon rind; squeeze juice from lemon to measure 2 teaspoons.
4. Place pine nuts and garlic in a blender or food processor; process until minced. Add lemon rind, lemon juice, arugula, oil, 2 tablespoons water, 1/4 teaspoon salt, and 1/4 teaspoon pepper; process until smooth. Serve with lamb.