Prep the Chicken: Preheat your oven to 375°F (190°C). Season the chicken breasts with olive oil, cumin, salt, and pepper on both sides.
Sear the Chicken: In a large, oven-safe skillet over medium-high heat, sear the chicken breasts for about 4-5 minutes on each side until golden brown.
Prepare Mango Salsa: While the chicken is searing, combine the diced mango, red bell pepper, red onion, jalapeño, cilantro, and lime juice in a bowl. Mix well and set aside.
Bake the Chicken: Once the chicken is seared, pour the mango salsa over the chicken breasts in the skillet. Transfer the skillet to the preheated oven and bake for 20-25 minutes or until the chicken is cooked through.
Serve: Remove the skillet from the oven and let it rest for a few minutes. Serve the chicken hot, topped generously with the mango salsa.