Heat oil in a non-stick skillet over medium-high heat. Saute onion until tender, about 4 minutes. Add jalapeno, ginger, turmeric and cayenne; saute until fragrant, about 1 minute. Add eggs, stirring constantly to blend flavors, about 2 minutes. Off heat, stir in tomato, cilantro, and salt. Serve warm, at room temperature or chilled.