Preheat the oven to 425 degrees. Line a baking sheet with foil, then coat with cooking spray.
Trim the green bean end, then wash well.
Place the green beans on the baking sheet, then drizzle them with olive oil. Season the beans with sea salt, freshly cracked pepper, garlic powder, and crushed red pepper flakes, to taste.
Place into the oven and roast for 7-8 minutes or until crisp-tender.