1. Preheat broiler. Spray sweet potato fries and steak with cooking spray. Place on separate baking sheets, and sprinkle with 1/4 teaspoon each salt and pepper. Broil vegetables 20 minutes, turning once. Cook steak simultaneously for 20 minutes, or until a meat thermometer inserted into the thickest part registers 160ï¿½ (medium) and fries until tender and crisp.
2. Combine yogurt, blue cheese, and remaining 1/4 teaspoon each salt and pepper. Toss with lettuce, tomato, and carrot.
3. Cut steak into strips. Top salad with steak and serve with sweet potato fries and ketchup.