Heat oven to 375°F. In 12-inch skillet, heat 1 tablespoon of the oil over medium-high heat. Cook onion, green chiles, jalapeño and garlic 4 to 6 minutes, stirring occasionally, until tender. Transfer to medium bowl. In same skillet, heat remaining 2 tablespoons oil over medium heat. Season chicken with 1/2 teaspoon of the salt and the pepper. Cook chicken 4 to 6 minutes, turning once, until lightly browned. Place chicken on top of rice.