Start by steaming the vegetables first. Peel and chop the potatoes into 1/2 inch cubes. Similarly peel and chop the carrots into small pieces as well. Place the chopped veggies along with green peas on a steamer basket. Steam until they are cooked but not mushy. I used a steaming basket and steamed in Instant pot for 2 minutes (with 1 cup water in main steel pot) and let the pressure release naturally. You can steam them using a stove-top steamer as well. Once steamed, set the veggies aside.