Rinse the potatoes and puncture the fork several times with all sides. Lubricate with olive oil, salt, season with spices.
Put the potatoes on the oven grate, preheated to 180 ° C, and bake for 60-75 minutes. Readiness is verified with a fork: potatoes should become soft.
On each potato make a longitudinal incision, sprinkle with salt, pepper and put a piece of butter.