Kentang Parmesan Panggang Renyah

Bahan-bahan (4 porsi)

• 750 g / 1.5 lb baby potatoes (, halved (about 3.5cm / 1.75", 20 - 24 potatoes))
• 2 tbsp olive oil (, plus more for drizzling)
• 1/2 cup / 50 g grated parmesan (, the sand-like type (Note 1))
• 1/2 tsp garlic powder ((or sub with onion powder))
• 1/2 tsp dried oregano or thyme
• 1/2 tsp paprika
• 1/4 tsp salt ((I use table salt, leave out to lower sodium))
• 1/2 tsp black pepper
• 3/4 cup sour cream, or sub with plain yoghurt (, or a combination of both)
• 1/4 cup finely chopped green onions/scallions (, plus more for garnish (or chives))