To cook the naan, heat a large skillet with a lid over medium-high heat. Slap a circle of dough into the hot skillet and cover the pan to trap the steam. Cook for 3 to 4 minutes, flip the dough, and turn the heat to low. Cook, covered, until the naan blisters, with a few big bubbles, 1 to 2 minutes. Remove from the pan and wrap in a clean kitchen towel. Repeat with the remaining three circles of dough.