01 - Preheat the oven to 425°F. Line a baking sheet with parchment paper.
02 - In a large bowl, toss green beans with olive oil, minced garlic, kosher salt, and black pepper until evenly coated.
03 - Spread the green beans in a single layer on the prepared baking sheet.
04 - Roast for 16 to 18 minutes, stirring halfway through, until tender and slightly blistered.
05 - Remove from oven. If desired, drizzle with lemon juice and sprinkle grated Parmesan cheese before serving.
06 - Serve immediately while hot.