1. Preheat broiler or prepare grill.
2. In a shallow bowl,combine 1/2 cup salsa and the tomato paste and stir until blended.
3. Add the chicken,turn to coat and let stand while you prepare the vegetable salsa.
4. In a medium bowl,combine the remaining 1 cup salsa,the bell pepper,corn,scallion,lime juice and cilantro.
5. Broil or grill chicken 4 inches from the heat for about 4 minutes per side or until the chicken is cooked through.
6. Place the chicken on 4 plates,spoon the vegetable salsa on the side and serve.