Heat 2tbsp mustard oil in a pan; add onions and cook until they start turning lightly brown around the edges. Add the ginger and garlic; cook for 1~2 minutes.
Add the chopped tomatoes and cook until mushy.
Next add the red chili powder and salt. Mix well. Add some water if the mixture looks too dry. Cook for 3~4 minutes.
Add the chopped Chinese chives and ground black sesame powder; cook for 2~3 minutes.
Finally garnish with chopped green onions or cilantro and Enjoy!!