Add the potatoes to a large pot and fill it with water about 1-2 inches above the potatoes. Bring the water to a boil on high heat. Cook for about 20 minutes (timed from turning on the burner), or until slightly fork-tender. We do not want the potatoes to cook all the way since we will be baking them after this.
In the meantime, preheat the oven to 425°F and line a full sized baking sheet (or two half sheets) with parchment paper or a silicone mat.
Grab a small bowl and mix together the corn starch, garlic, onion, salt, pepper, paprika, cayenne pepper, and cumin.
Once the potatoes are parboiled, dice them into 1″ squares, and add them to a large bowl. Add oil to your potatoes and gently mix together until fully coated. Sprinkle over the spice blend and mix through until they are coated on all sides.
Transfer seasoned potatoes to the baking sheet(s) and spread out to a single layer.
Place into the oven and bake for 40 minutes, mixing potatoes halfway through.
Allow the potatoes to cool slightly before serving. Enjoy!
