Preheat the oven to 450F

Spray the roasting pan with cooking spray

Pour vegetable oil into roasting pan

Put the roasting pan into the oven while it preheats

Swirl the oil in the pan to coat then entire interior surface

Wash the potatoes

Cut the potatoes into 1 inch cubes

Fill the large pot with water

Bring the water to a boil over high heat

Add the cubed potatoes to the boiling water

Bring the water back to a boil

Simmer for 5 minutes

Drain the water from the potatoes

Remove the heated pan from the preheated oven

Pour the drained potatoes onto the heated pan in a single layer

Toss the potatoes to coat them with the hot oil

Sprinkle the garlic powder evenly over the potatoes

Toss the potatoes again to distribute the garlic powder

Return the pan to the oven

Roast for 40 minutes, stirring the potatoes every 10 minutes

Sprinkle with salt and pepper to taste

Sprinkle the parsley evenly over the potatoes

Serve