Preheat oven to 375°F (190°C). Grease a 9×13 inch baking dish with olive oil.
Sauté cubed chicken seasoned with salt and pepper in a skillet over medium heat until golden brown (6-8 minutes).
Add minced garlic and broccoli to the skillet; sauté for an additional 3-4 minutes until broccoli is bright green.
Cook pasta in salted water until al dente according to package instructions; drain but reserve some pasta water.
Heat heavy cream in a saucepan and stir in Parmesan until melted; add Italian seasoning.
Combine cooked pasta, sautéed chicken, broccoli, and creamy sauce in the baking dish; mix until well coated. Bake for 20-25 minutes until bubbly and slightly golden on top.
Notes
Customize by adding other vegetables or using leftover roasted chicken for a quicker preparation.