Preheat your oven to 400°F and prepare two baking sheets by giving them a spritz of non-stick spray.
Take the lovely baby potatoes, wash them well, and slice them thinly. Place the slices in a large mixing bowl.
Drizzle the vegetable oil over the potatoes and stir them gently to ensure they are well-coated.
Now, let’s create a flavor-packed mixture! In a gallon-size plastic bag, combine the grated Parmesan cheese, garlic salt, and pepper. Seal the bag and give it a good shake.
Once mixed, add the sliced potatoes to the bag and shake it once more, ensuring each slice is generously coated.
Arrange those heavenly potato slices in a single layer on your prepared baking sheets.
Bake them in the preheated oven for about 40 minutes, making sure to turn the slices halfway through so they brown evenly.

When they are beautifully browned and fork-tender, take them out of the oven. Serve promptly with your favorite dipping sauce, perhaps a rich ranch dressing.