Preheat an oven to 400°F. Place chickpeas on a rimmed baking sheet, and toss with olive oil, a few grinds of black pepper and a couple pinches of salt. Roast, tossing occasionally, until crispy and golden on the outside and creamy within (about 20 - 25 minutes). Transfer to a bowl and toss with Parmesan cheese and a few more grinds of black pepper. Season to taste with additional salt.