Preheat the Blackstone griddle to medium-high heat.

In a large bowl, toss the diced potatoes with olive oil, garlic powder, onion powder, paprika, salt, and black pepper until evenly coated.

Spread the seasoned potatoes evenly on the griddle.

Cook for about 15-20 minutes, stirring occasionally, until the potatoes are golden brown and crispy.

Remove from heat and garnish with chopped parsley before serving.