Peel the potatoes, cut into eighths and place in a large ovenproof dish. Drizzle with lemon juice, olive oil and water. Scatter the chopped garlic cloves, oregano, salt and pepper on top.
Bake in the preheated oven at 200 ° C on the top shelf without a lid for about an hour until the potatoes are crispy brown. Move it from time to time during baking, add some water if necessary.