To prepare the roasted potatoes begin by preheating the oven to 200 ° C. Then peel the potatoes and cut them into cubes of medium size.
Rinse several times the diced potatoes with cold water, until the water is no more turbid, so that the potatoes will lose the starch and will become more crispy.
Boil the potatoes for 3-4 minutes then drain them well. Grease a baking dish with olive oil, pour over the potatoes, peel the garlic cloves, cut them in half and pour them as well, sprinkle with thyme and sprinkle with olive oil.
Put the pan in the oven and cook for about an hour, stirring the potatoes halfway through cooking. Ten minutes before turning off the oven, put salt and pepper on the potatoes and when they are done, remove them from the oven and serve them when they are warm.