Preheat your oven to 450° Spray a cookie sheet with cooking spray.
Scrub potatoes and cut into 1/2" cubes. Place in a large bowl.
Add the olive oil to the potatoes and stir to coat. Then add the soup mix, garlic, and pepper; stir again.
Spread the potatoes in a single layer on the prepared baking sheet. Bake at 450 degrees for about 30 minutes, stirring after 15 minutes.
Notes
Leftover potatoes can be stored in the refrigerator in an airtight container for 3-4 days. I recommend reheating them in an air fryer basket or skillet so they maintain their crispness.
We like the potatoes golden brown and crispy, but you can just cook them for 20 minutes until they are tender.