Gently slide finger tips between chicken meat and skin along 1 long side of each breast, leaving skin attached on opposite ling side. Place 3 goat cheese rounds under skin of each chicken breast. skewer seams closed with toothpicks. Sprinkle chicken with salt and pepper. (Can be made 1 day ahead. Cover and chill.) Prepare barbecue (medium-high heat) or preheat broiler. Place oil in large bowl. Place onions on baking sheet. Brush with 1 tablespoon oil. Add bell peppers to remaining oil in bowl; toss to coat. Sprinkle onions and peppers with salt and pepper. Grill or broil chicken, skin toward heat, until cooked through, turning occasionally, abut 22 minutes. Transfer to baking sheet; tent with foil. Grill or broil onions and peppers until lightly charred, turning occasionally, about 4 minutes. Remove toothpicks from chicken. Arrange chicken, onions and peppers on plates. Spoon Jalapeno Salsa over chicken. Spoon Tomato Salsa on side. Sprinkle with chives and serve.