Scrub the outside of potatoes, and dry off with a clean kitchen towel.
Poke 7-10 holes in the skin of the potato with a fork.
In a medium-sized mixing bowl, add olive oil, salt, and minced garlic.
Put two potatoes in the bowl and swirl it around until the entire potato is covered in the oil/salt/garlic mixture. Move to a plate. Repeat with the other potatoes.
Put a piece of foil or a baking sheeting on the bottom rack of oven. Place the potatoes directly on the rack above the foil/baking sheet.
Bake for 60-90 minutes depending on the size of your potatoes. The potatoes are ready when a sharp knife pierces easily into the skin.
Notes
The dripping olive oil on the foil/baking sheet will smell "hot" in your kitchen, and there may be some sizzling. That is all perfectly normal.