Pre-heat oven to 350 degrees F.
Slice the peeled potatoes lengthwise into thirds.
Holding the sliced potatoes together, slice horizontally into 1" slices.
Cut each of these slices of potatoes into 1" cubes.
In a very large mixing bowl, toss the potato cubes with olive oil to cover completely.
Add the minced garlic, fresh chopped rosemary, salt and pepper.
Toss well.
Place on a baking sheet with 1" sides.
Bake on the middle rack for 45 minutes.
With a sharp metal spatula, turn the potatoes over ONCE and once only.
Turn up the oven heat to 450 degrees F.
Continue baking on the top rack of the oven for 15 - 30 minutes, keeping a very close eye on the potatoes so that they do not burn, but yet turn a golden-brown color.
If you are not satisfied with the color of the potatoes at this point, turn the oven onto 'Broil' and bake for another 5 - 10 minutes, once again keeping a very close eye on the potatoes so that they do not burn.
Enjoy the amazing aroma in your kitchen!
Enjoy the delicious Italian potatoes!