Heat a large 3 to 5-quart pot on medium-high heat and add the garlic infused olive oil, spaghetti noodles, and chicken stock. Bring to a low boil and cook 8-9 minutes, stirring often.
Reduce the heat to low and add the milk and butter. Stir until combined.
Add the black pepper, dried parsley, and Parmesan cheese, and stir until combined.
Let simmer on low 3-5 minutes. It will appear to be a lot of sauce, but it will absorb into the pasta as it cools.
Serve with a sprinkle of Parmesan cheese, ground black pepper, and chopped fresh parsley.
Notes
Note 1: Recipe was tested using gluten free Barilla noodles. Note 2: The recipe was tested with 1% milk. Using lactose-free milk is also an option. Whatever milk you use, it needs to have fat to achieve a creamy sauce. Low FODMAP Notes: Low FODMAP ingredient information is based on the Monash University Food App and FODMAP Friendly App testing results.