01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a large bowl, combine halved potatoes, olive oil, garlic, rosemary, thyme, oregano, salt, and pepper. Toss until potatoes are evenly coated.
03 - Spread potatoes in a single layer on the prepared baking sheet. Roast for 20 minutes.
04 - Meanwhile, in the same bowl, 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 with the potatoes. Stir gently to combine.
06 - Continue roasting for another 15 minutes, or until potatoes are golden and green beans are tender-crisp.
07 - Remove from oven. Sprinkle with parsley and Parmesan cheese, if using. Serve hot.