1️⃣ Cook the pasta and broccoli:

Bring a large pot of salted water to a boil.

Add the penne pasta and cook according to package instructions until al dente.

In the last 5 minutes of cooking, add the broccoli florets to the boiling water with the pasta.

Drain and set aside.

2️⃣ Prepare the sauce:

In a large pot, heat the olive oil over medium heat.

Add the diced onion and cook for 2-3 minutes until softened.

Add the minced garlic, salt, and black pepper, and cook for another minute until fragrant.

3️⃣ Thicken the sauce:

Sprinkle the flour over the onion and garlic mixture and stir continuously for 1-2 minutes.

Gradually whisk in the whole milk, stirring until smooth.

Cook for 2-3 minutes until the sauce thickens.

4️⃣ Add the Parmesan:

Stir in the grated Parmesan cheese and mix until melted and smooth.

5️⃣ Combine everything:

Add the cooked pasta, broccoli, and diced chicken to the pot with the sauce.

Stir until everything is well coated and heated through (about 2-3 minutes).

6️⃣ Garnish and serve:

Transfer the pasta to a serving bowl.

Sprinkle with additional grated Parmesan cheese if desired.

Serve hot and enjoy!