01 -
Bring a large pot of salted water to boil. Cook penne according to package instructions. Add broccoli florets in the last 5 minutes. Drain and set aside.
02 -
Heat olive oil in a large pot over medium heat. Cook diced onion for 2-3 minutes until soft. Add garlic, salt, and pepper, cook 1 minute more.
03 -
Sprinkle flour over onion mixture and cook for 1-2 minutes, stirring constantly.
04 -
Gradually whisk in milk until smooth. Cook 2-3 minutes until thickened. Stir in parmesan cheese until melted.
05 -
Add cooked pasta, broccoli, and diced chicken to the sauce. Stir until well coated and heated through, 2-3 minutes.
06 -
Transfer to serving bowl, garnish with extra parmesan if desired. Serve hot.