Heat oil in a hot pan, add mustard seeds and when they start crackling, add cumin seeds, chopped green chillies and garlic. Add few curry leaves, chopped onions and sauté until the onions are soft. Add hing, turmeric, red chilli powder, and pinch of garam masala powder (optional). Sauté all the spices well, so that they don’t get burnt. Add cow pea leaves and amaranth leaves together and mix well. Add little salt and mix. Cover the pan with a lid and cook the greens for about 5 minutes. After 5 minutes, when the leaves are soft and tender, add chopped tomatoes and mix well. Cook for another 2 minutes and then add freshly ground coconut and mix well and sauté for few minutes and then switch off the flame.