4-6 cups kale, loosely packed, sliced leaves of Italian black (Lacinato, dinosaur, cavolo nero) midribs removed juice of 1 lemon 3-4 tablespoons extra-virgin olive oil 2 cloves garlic, mashed salt & pepper, to taste hot red pepper flakes, to taste 2/3 cup grated Pecorino Toscano cheese (Rosselino variety if you can find it) or other flavorful grating cheese such as Asiago or Parmesan