Heat the oven to 400 degrees F. Wash the raw potatoes, then dry them with a paper towel.
Cut the unpeeled potatoes into ½-inch cubes.** Toss the cubes with 1 tablespoon olive oil in a bowl.
Transfer the potatoes to a large baking sheet*** and spread into a single layer. Roast until crispy on the outside and soft on the inside (about 25 minutes). Stir the cubes around halfway through the baking time.
In a small bowl, stir the remaining olive oil, lemon zest, lemon juice and basil together.
Toss the potatoes with the lemon basil oil and season to taste with salt and pepper. Serve immediately.
Recipe notes:
*You need about ½ cup packed leaves for that.**To ensure that this dish takes no more than 30 minutes to make, cut the potatoes into ½-inch cubes. If you cut them larger than that they will take longer to roast.***A dark baking sheet works best because it browns the potatoes from the bottom. That will make them nice and crispy.