Create a flavorful and easy-to-make dinner with this Cheesy Chicken Penne Bake that combines tender pasta, succulent chicken, and a homemade cheese sauce. The prep takes just 20 minutes, and you'll have a satisfying meal that the whole family will love!
Preheat oven to 425 degrees F (220 degrees C). Spray an 8-inch square baking dish with nonstick cooking spray.
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Boil the penne pasta in a large pot of salted water for 5 minutes, then drain.
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Heat olive oil in a skillet over medium heat. Add the diced chicken and cook for about 5 minutes until the chicken is cooked through. Set aside.
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In the same skillet, add mushrooms and onions, sautéing for about 3 minutes or until softened. Set aside.
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In a saucepan, melt the butter over medium heat. Whisk in the flour and cook for 1 minute. Slowly whisk in the milk, stirring continuously until the mixture is thickened. Remove from heat and stir in 1 cup of grated cheddar cheese, salt, and pepper.
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In the 8-inch square baking dish, combine the cooked pasta, cooked chicken, sautéed mushrooms and onions, and cheese sauce, stirring until well mixed.
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Stir in the sour cream.
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Top the pasta mixture with the remaining 1/2 cup of grated cheddar cheese.
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Bake, uncovered, in the preheated oven for 20 minutes, or until the cheese is melted and bubbly.