6 oz) package dry Alfredo sauce mix (such as Knorr®)
½ cup sour cream
salt and ground black pepper to taste
1 cup grated Parmesan cheese
4 slices cooked and crumbled bacon
Methods :
Place broccoli and water in a microwave-safe bowl. Cover and microwave on high until steamed and tender, 3 to 4 minutes. Remove and drain excess liquid; set aside.
While broccoli is steaming, place 1 tablespoon ranch dressing mix in a large resealable plastic bag. Add chicken and pepper, seal the bag, and massage to coat chicken with seasonings.
Pour chicken broth into a large pot and bring a boil over medium-high heat. Add shells and return to a boil. Reduce heat to medium-low and cook, stirring occasionally until pasta is nearly done, about 10 minutes. Drain pasta, reserving 1/2 cup of cooking broth.
Preheat the oven to 350 degrees F (175 degrees C). Grease a 9×13-inch casserole dish.
Heat butter and olive oil in a large nonstick skillet over medium-high heat. Add chicken to the hot skillet, working in batches if necessary, and cook until browned on all sides, about 7 minutes. Remove chicken to a plate.
Add milk, Alfredo sauce mix, and remaining 2 tablespoons ranch dressing mix to the hot skillet; bring to a boil. Turn off the heat, add chicken and any accumulated juices, pasta, broccoli, sour cream, reserved 1/2 cup pasta cooking broth, salt, and pepper. Transfer mixture to the prepared casserole dish and sprinkle with Parmesan cheese and bacon.
Bake in the preheated oven until cheese is melted and sauce is bubbly, about 20 minutes. Serve warm.