1. In a large frying pan, heat the oil over moderate heat. Add the onion and cook, stirring occasionally, until translucent, about 5 minutes. Add the garlic and ginger and cook, stirring, for 1 minute.
2. Meanwhile, in a small bowl, combine the coriander, cumin, red-pepper flakes, turmeric, salt, and water. Add the paste to the onion and cook, stirring, for 1 minute.
3. Add the meat to the pan and cook, stirring, for 3 minutes. Raise the heat to moderately high and cook to your taste, stirring, about 2 minutes longer for medium rare. Stir in the cilantro.
Wine Recommendation: Either a shiraz from Australia or a syrah from California will provide enough flavor to stand up to this curry and contribute a black-pepper spiciness, too.