A quick and easy, one-pan recipe that puts a creative spin on the classic Cacio e Pepe, using cheese tortellini instead of spaghetti. In this simple weeknight meal, fresh or frozen tortellini are first pan-seared in a cast-iron skillet until browned and slightly crispy. Water is then added to the skillet to steam and cook the pasta through. The dish is finished off the heat by tossing the tortellini with a generous amount of Pecorino Romano cheese, freshly ground black pepper, olive oil, and fresh greens like baby kale or spinach.