1. Preheat oven to 400°.
2. Place green onions and carrot strips in a 2-cup glass measuring cup; cover with heavy-duty plastic wrap, and microwave at HIGH 3 minutes. Drain and set aside.
3. Combine lemon juice, olive oil, and paprika in a small bowl; stir well.
4. Cut 4 (15-inch) squares of aluminum foil. Place foil on a large baking sheet. Lightly coat squares with cooking spray. Place a fillet in center of each square; top fillets evenly with green onion mixture. Spoon lemon juice mixture evenly over fillets and green onion mixture; sprinkle with salt. Top each serving with a lemon slice. Fold foil over fillets and vegetables, and crimp edges to seal. Bake at 400° for 8 minutes. Transfer pouches to individual serving plates; cut an X in top of each pouch, and fold cut edges back.