1. Put a baking sheet in the oven and preheat to 200°C. Put the potatoes, olive oil, garlic, rosemary, sage, thyme and some salt and pepper in a large mixing bowl and toss until the potatoes are well coated.
2. Spread the potatoes on the hot baking sheet (they should sizzle when they hit the pan) and roast until the potatoes are browned and fork-tender, about 40 minutes. Serve warm.