Step 1: Cook the Pasta - Bring a large pot of salted water to a boil. Add the pasta and cook according to package instructions until al dente. Drain and set aside.

Step 2: Prepare the Chicken Bites - Season the chicken pieces generously with salt, pepper, and Italian seasoning. Heat the olive oil and 2 tablespoons of butter in a large skillet over medium-high heat. Add the chicken bites to the skillet and cook for 5–6 minutes, stirring occasionally, until golden brown and cooked through. Remove the chicken from the skillet and set aside.

Step 3: Make the Garlic Butter Sauce - In the same skillet, add the remaining 2 tablespoons of butter and let it melt. Stir in the minced garlic and cook for 30 seconds to 1 minute, until fragrant. Be careful not to burn the garlic.

Step 4: Create the Creamy Parmesan Sauce - Pour the heavy cream into the skillet and stir to combine with the garlic butter. Add the grated Parmesan cheese, garlic powder, salt, and pepper. Whisk continuously until the cheese melts and the sauce thickens slightly, about 3–4 minutes. If adding optional ingredients like spinach or cherry tomatoes, stir them in now and cook until softened.

Step 5: Combine Everything - Return the cooked chicken bites to the skillet, tossing them gently in the creamy Parmesan sauce to coat evenly. Add the cooked pasta to the skillet and toss everything together until well combined and heated through.

Step 6: Garnish and Serve - Taste and adjust seasoning with additional salt, pepper, or red pepper flakes if desired. Serve hot, garnished with fresh parsley and an extra sprinkle of Parmesan cheese.