1. 1. In a large pot or deep skillet, heat olive oil or butter over medium heat. Add the chopped onion (if using) and minced garlic. Sauté for 2–3 minutes, stirring frequently, until the onion is translucent and the garlic is fragrant.

2. 2. Stir in the shredded or diced chicken, the finely chopped chipotle peppers, and the adobo sauce. Cook for an additional 1–2 minutes, allowing the flavors to meld together.

3. 3. Add the penne pasta and chicken broth to the pot. Bring the mixture to a boil, then reduce the heat to a simmer. Cover the pot and cook the pasta according to the package instructions, stirring occasionally, until the pasta is tender and most of the liquid has been absorbed.

4. 4. Once the pasta is cooked, stir in the heavy cream and the shredded cheddar cheese. Cook, stirring frequently, until the cheese has melted and the sauce has reached a creamy, velvety consistency.

5. 5. Taste the One-Pot Smoky Chipotle Cheesy Chicken Pasta and adjust the seasoning with salt and pepper as needed. Serve the dish hot, garnished with additional shredded cheese or fresh herbs if desired.