Start by seasoning the chicken breasts with seasoned salt and black pepper. Make sure to coat both sides evenly for the best flavor.
In a large skillet, melt 1 tablespoon of butter over medium-high heat. Once the butter is bubbling, carefully add the seasoned chicken breasts to the skillet. Cook for about 5-7 minutes on each side, until the chicken is golden brown and cooked through. Use a meat thermometer to check for doneness; the internal temperature should reach 165°F (75°C). Remove the chicken from the skillet and set aside.
In the same skillet, add the sliced onions. Sauté for about 2-3 minutes until they start to soften. Add a pinch of salt to help draw out their moisture. Next, add the sliced mushrooms and continue to sauté for another 5 minutes, until the mushrooms are tender and the onions are caramelized.
Return the cooked chicken breasts to the skillet, nestling them among the sautéed onions and mushrooms. Sprinkle the shredded Monterey Jack cheese generously over the chicken. Cover the skillet with a lid and let it cook for an additional 2-3 minutes over low heat, or until the cheese is melted and bubbly.
Once the cheese is melted, remove the skillet from heat. Serve the Texas Roadhouse Smothered Chicken hot, garnished with fresh herbs if desired. Pair it with your favorite sides for a complete meal!