Preheat oven to 350 degrees F. Prepare a baking sheet with nonstick cooking spray. Place green beans on a baking sheet (if using frozen green beans allow to sit out or rise with lukewarm water and pat dry)
Pour olive oil over green beans, garlic powder, and sprinkle on salt and pepper. Use a spatula to mix until green beans are evenly coated.
Bake for 10-15 minutes or until fully cooked. Serve and enjoy!