Place potatoes in a large pot of salted water and bring to a boil; cook for 10-12 minutes until fork-tender then drain.
In a large skillet, heat olive oil and butter over medium heat until butter is melted and foaming.
Add minced garlic to the skillet and sauté for 1 minute until fragrant, ensuring it does not brown.
Pour in the heavy cream and simmer for 3-5 minutes until the sauce begins to thicken slightly.
Whisk in the parmesan cheese, salt, and pepper until the cheese is fully melted and integrated.
Add the cooked potatoes to the skillet and toss to coat thoroughly in the garlic cream sauce.
Garnish with fresh parsley and serve immediately.