Heat oil in a non-stick pan, add turmeric powder, red chilli powder, cumin powder and garam masala powder, mix well and saute on low heat for 1-2 minutes.
Add pointed gourd and potatoes and mix well. Add salt and mix well. Add ½ cup water, mix, cover and cook on medium heat, stirring occasionally, till the vegetables are done.
Transfer into a serving bowl, garnish with coriander leaves and serve hot