I used to eat this vegetable which grows as a weed among other vegetables in Malaysia. This vegetable is called "garbage vegetable" translated from the Tamil word. I have a bunch of these vegetables growing in my garden every year and I always pick them very young to cook them. They are very tasty cooked with lentils or just as stir fries with shredded coconut or tofu.
This vegetable resembles Malaysian spinach in flavor.
You can substitute spinach, kale, Swiss chard for this recipe. Just cook the greens with cooked lentils, and lots of onions and garlic and some green chilies. Towards the end of cooking I add sliced zucchini and cooked for 2 or 3 minutes.