In your large pot, heat the extra virgin olive oil over medium heat. Add the finely chopped garlic and sauté for about 1-2 minutes until fragrant. Be careful not to let the garlic brown, as this can lead to a bitter taste.
Pour in the low-sodium chicken broth and low-fat milk. Stir to combine, and bring the mixture to a gentle simmer.
Once the liquid is simmering, add the whole-wheat spaghetti or your choice of long pasta. Stir to ensure the pasta is submerged in the liquid.
Cook the pasta according to the package instructions, usually around 8-10 minutes, stirring occasionally. If you opted for cornstarch, mix it with a little water to create a slurry and add it to the pot during the last couple of minutes of cooking. This will help thicken the sauce slightly.
Once the pasta is cooked, remove the pot from the heat. Stir in the grated Parmesan cheese, mixing until melted and creamy. Season with salt and pepper to taste.
Finally, sprinkle with fresh parsley for a pop of color and freshness. Serve immediately, and enjoy your delicious One-Pot Garlic Parmesan Pasta!