Preheat oven to 375degrees. Place chicken in a greased 13x9-in. baking dish; sprinkle with salt and pepper. Bake, uncovered, 30 minutes., Meanwhile, in a large skillet, heat oil over medium-high heat. Add sweet potatoes; cook and stir 10-12 minutes or until tender. In a small bowl, mix chutney and peanut butter; stir into sweet potatoes. Add tomatoes; heat through., Spoon potato mixture over chicken. Bake 10-15 minutes longer or until a thermometer inserted in chicken reads 180degrees.