Preheat your oven to 425°F (220°C). A hot oven is crucial for achieving that golden-brown exterior.
Wash the mini creamer potatoes thoroughly under cold water. Pat them dry with a towel. If they are larger than a golf ball, you may want to cut them in half for even cooking.
In a mixing bowl, combine the washed potatoes with vegetable oil, salt, pepper, melted butter, and minced garlic. Toss well to ensure every potato is coated in the flavorful mixture.
Spread the potatoes in a single layer on the prepared baking sheet. Make sure they have enough space to roast evenly. Roast in the preheated oven for about 25-30 minutes or until they are golden brown and fork-tender, stirring halfway through cooking.
Once the potatoes are done roasting, remove them from the oven. Immediately sprinkle the fresh parsley and grated Parmesan cheese over the hot potatoes. Toss gently to combine.
Transfer the roasted mini potatoes to a serving bowl and enjoy them warm as a delightful side dish.