Cook bacon, if needed.
Heat oven to 375 F. Spray a 9x13-inch baking dish with nonstick cooking spray.
Cook the penne pasta according to package directions toal dente. Drain.
In a small skillet, combine vegetable oil, chicken pieces, and ranch dressing mix. Cook until the chicken is done. Remove the chicken to a small dish and set aside.
In the same skillet, add the butter, garlic, and flour. Stir and cook for 1 minute.
Add the whipping cream and cheddar cheese and stir until cheese is melted and mixture is bubbly smooth.
In the prepared baking dish, place the cooked and drained pasta. Pour the cheese sauce over the pasta. Top with chicken, cooked and diced bacon, feta cheese crumbles, and hot sauce.
Bakein the preheated ovenfor 15 minutes until bubbly.
Serve Buffalo Chicken Pasta Casserole, hot from the oven, with side of veggies.