Rinse the potatoes to remove all the dirt.

Crumble the feta cheese with your hands and set aside in a bowl.

Heat a medium-sized cooking pot with water and add a bit of kosher salt. Boil the potatoes for about 5-7 minutes.

Preheat the oven to 230°C / 446°F.

Transfer the potatoes to a large baking tray and drizzle with olive oil.

Bake the potatoes for about 12-15 minutes. Flip the potatoes and bake for another 10 minutes.

Slice each potato lengthwise (not all the way through) and then smash it gently with a spatula.

Drizzle with some more olive oil, ground pepper, and salt. Stuff some of the crumbled feta in the sliced potato, and toss the remaining on top.

Toss a few slices of onion here and there and sprinkle with oregano.

Bake for approximately 10 minutes more. Until the feta cheese melts, and the onion softens slightly.

Ready to serve.