Cut the sweet potato lengthwise in half. Then cut each half into thirds, lengthwise. Once you have the long pieces, cut them into approximately 1 to 1.5 inch cubes.
In a sheet pan, mix your sweet potato cubes with olive oil, salt and pepper, and garlic powder.
Roast for 25-30 minutes, give it a shake half way through.
To make the sweet potatoes even more crispy, broil for 2-3 minutes.