3 tablespoons cooking oil
1 onion, cut into thin slices
3 Cloves Garlic, minced
1 tablespoon minced fresh Ginger
2 1/2 teaspoons ground coriander
1 teaspoon ground Cumin
1/4 teaspoon dried red Pepper flakes
1/8 teaspoon turmeric
1/2 teaspoon Salt
2 tablespoons water
1 1/2 pounds sirloin steak, cut into 1-inch cubes
3 tablespoons chopped cilantro

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.