3 lb. russet baking potatoes, peeled and cut into 2-inch pieces

Coarse salt and freshly ground black pepper

1/4 C. good-quality extra-virgin olive oil

1 T. finely chopped fresh rosemary

1/2 C. finely chopped pitted black olives

 

In a large pot, cover the potatoes with salted water. Bring the water to a boil, reduce heat to medium-low, and simmer until the potatoes are very tender, about 20 minutes. While the potatoes are cooking, heat the oil and rosemary in a small saucepan over medium-low heat until it is fragrant, about 4 minutes. (If wisps of smoke start to rise off the surface of the oil, immediately remove it from the heat.) Cover and set aside to steep, about 15 minutes. Drain the potatoes, reserving 1 C. of the potato water. Return the potatoes to the pot and add ½ C. of the potato water, mashing well. Slowly drizzle in the rosemary-oil and continue mashing until combined. Stir in the olives and season generously with salt and lots of pepper. Serve warm.