Cheese buldak is a Korean dish that is incredibly easy to prepare: a marinade of red-pepper paste and red-pepper flakes that becomes a fiery sauce for braised chicken, which is then served beneath a cloak of broiler-melted mozzarella. A child could do it, or an adult who often acts like one. Mine is an adaptation of a recipe that owes its deepest debt to Emily Kim, the Korean web star known as Maangchi, whose video for cheese buldak has been viewed on YouTube more than seven million times…