Preheat oven to 375 degrees F. Lightly sprinkle both sides of chicken with blackened steak seasoning. In a large ovenproof skillet heat the 1 Tbsp. oil over medium heat. Add chicken; cook until browned, turning once. Bake about 15 minutes or until chicken is no longer pink (170 degrees F).
Meanwhile, for salsa, in large bowl whisk rice vinegar, the 2 Tbsp. oil, cumin, salt, and black pepper. Stir in avocado, papaya, sweet pepper, and chopped cilantro. Serve with chicken. If desired, garnish with cilantro. Makes 4 servings.