Preheat your oven to 375°F. It’s crucial to have the oven hot enough to ensure the chicken cooks evenly.
While the oven is heating, lightly grease a 9x13 baking dish with nonstick spray. This will help prevent the chicken from sticking and make cleanup easier.
Place the chicken breasts in the baking dish in a single layer. Make sure they fit snugly, as this ensures even cooking.
Sprinkle the chicken with salt and black pepper. Seasoning the chicken at this stage will help boost its flavors.
In a medium bowl, combine the softened cream cheese, salsa, and fajita seasoning. Beat them together until smooth, creating a creamy topping that will infuse the chicken with flavor.
Spread the cream cheese mixture evenly over the chicken breasts. It should cover them nicely, ensuring that every bite is creamy and flavorful.
Layer the sliced green and red bell peppers over the top of the chicken. This not only adds color but also a delightful crunch.
Sprinkle the shredded Colby Jack cheese evenly over the peppers. The cheese will melt beautifully, creating a gooey topping that everyone will love.
Place the dish in the oven uncovered. Bake for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F. If your chicken is thinner, start checking around the 20-minute mark to avoid overcooking.
Once done, let the dish stand for 5 minutes before serving. This resting time allows the chicken to remain juicy and the cheese topping to set, making for a perfect slice.