Start by boiling the potatoes till tender. I use a pressure cooker and it takes me about 5 mins in it. Put water, a pinch of salt, cut the potatoes in half (no need of peeling, just wash them clean). Cover the potatoes with ample water (about 1.5 inch more after covering the potatoes) and cook in a pressure cooker for 5-6 whistles. Let the pressure release naturally.
Or simply boil them in water for 15 mins or till fork tender.
Next, in a saucepan boil water. Once the water is boiling, add the cauliflower and carrot and let it boil (not simmer) for 5 mins. While that’s happening, chop up the vegetables.
Remove the vegetables with a slotted spoon and keep aside.
Into the same water, add the beans and boil for 3 mins. Drain and keep aside. Cut beans into 1 inch pieces.