Preheat your oven to 425°F (220°C).
Trim the ends off the green beans and place them in a large bowl.
Drizzle olive oil over the green beans, adding minced garlic, salt, and pepper. Toss to coat evenly.
Spread the green beans in a single layer on a baking sheet.
Roast in the preheated oven for 15-20 minutes, stirring halfway through.
Once roasted, sprinkle grated Parmesan cheese over the beans and return to the oven for another 2-3 minutes to melt the cheese.
Serve warm as a side dish or snack.
