Preheat oven to 400 degrees F.
Combine wine, broth, prunes, brown sugar, vinegar, olives, garlic, oil and oregano in a saucepan and bring to a simmer over medium heat. Reduce the heat and simmer gently, uncovered, for 10 minutes. Season to taste with salt and pepper.
Place chicken breasts in a large shallow baking dish. Pour the sauce over the chicken, turning to coat. Scatter capers over the top. Bake until the chicken is no longer pink in the center, 30 to 35 minutes.
1 fruit, 1 other carbohydrate, 4 lean meat, 1 fat