01 -
Cut chicken breasts into uniform bite-sized pieces. Combine diced chicken with Italian dressing, onion powder, garlic powder, and black pepper in a bowl. Marinate for at least 15 minutes at room temperature or longer in refrigerator for deeper flavor.
02 -
Heat 1 tablespoon olive oil in a large skillet over medium-high heat. Add marinated chicken in a single layer and cook for 6-8 minutes, stirring occasionally, until chicken reaches 165°F internal temperature and develops golden-brown edges. Remove chicken and set aside.
03 -
Cook tortellini in a large pot of salted boiling water according to package directions until tender but still slightly firm. Drain thoroughly and toss with a small amount of olive oil to prevent sticking.
04 -
Reduce heat to medium and add butter to the same skillet. Sprinkle flour over melted butter and whisk constantly for 1-2 minutes to create a smooth roux and eliminate raw flour taste.
05 -
Pour heavy whipping cream into the roux while whisking constantly to prevent lumps. Continue whisking as mixture heats and thickens to a gentle simmer, about 3-5 minutes.
06 -
Remove skillet from heat and add shredded Parmesan and mozzarella cheeses, stirring continuously until completely melted and sauce is smooth and creamy. Season with salt and black pepper to taste.
07 -
Return cooked chicken and drained tortellini to the skillet. Gently fold everything together until each piece of pasta and chicken is completely coated with creamy cheese sauce. Work carefully to avoid breaking delicate tortellini.