01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a large bowl, toss the potatoes with olive oil, garlic, salt, pepper, and Italian herbs until evenly coated.
03 - Spread potatoes in a single layer on the prepared baking sheet. Roast for 20 minutes.
04 - Toss green beans with a drizzle of olive oil and a pinch of salt and pepper.
05 - After 20 minutes, add green beans to the baking sheet, tossing gently with the potatoes. Roast for another 15 minutes, or until potatoes are golden and tender, and green beans are crisp-tender.
06 - Remove from oven. Sprinkle with fresh parsley and Parmesan if using. Serve hot.