Peel and slice potatoes into 2-inch (5 cm) pieces and add them to a large pot. Pour in water to cover the potatoes by a few inches and also add about 1 tsp of salt. Bring it to a boil and cook the potatoes covered for around 15 minutes, or until soft.
Drain the water from the pot but reserve about 1/2 cup of the cooking water. Mash the potatoes in the pot with a potato masher.
Pour in the plant-based milk, a little at a time, mashing in-between. Also add salt, pepper, and nutmeg. Then add in the reserved cooking water, gradually, while mashing, until you reach the creamy consistency that you desire.
Taste it and add more salt/pepper or nutmeg if needed and optionally a little olive oil or dairy-free butter.
Garnish with fresh chives, drizzle with olive oil, and serve. Enjoy! Check out the serving suggestions in the blog post.