Place 2 cups of water into the pressure cooker, then add the halved baby potatoes on to the steamer grate. Sprinkle the potatoes with a little salt while you add them, (1/2 tsp).
Lock the lid onto the cooker and select steam on high pressure and set for 5 minutes.
While the potatoes cook, whisk together the dressing ingredients, adding the additional 1/2 tsp salt and the pepper. I added half of the basil and kept the remainder to sprinkle on as a garnish.
When the potatoes are done, place them into a large bowl and add the dressing then fold to combine.
Serve warm sprinkling with more basil.
Adapted from Crock-Pot recipe ideas.To steam potatoes without a pressure cooker, use a steamer basket or a small metal colander in a suitable pot, and steam covered for 15 to 20 minutes until the potatoes are fork tender.