Preheat your Blackstone Griddle to 400° F. (In most cases, this will be low heat.)
Place the potatoes in a large bowl and toss with avocado oil, garlic powder, rosemary, salt, and pepper.
Oil the griddle well.
Add the potatoes and cook, stirring occasionally, for 20 minutes.
Heat oil in a skillet over medium-high heat.
Place the potatoes in a large bowl and toss with avocado oil, garlic powder, rosemary, salt, and pepper.
Add the potatoes and cook, stirring occasionally, for 20 minutes. Turn the heat down towards the end if the potatoes start to get too brown.
