Bacon-Leek Mashed Potatoes

Cook Yukon Gold potatoes in simmering water until tender, 20 minutes. Cook bacon slices in a skillet over medium-high until crispy. Remove and crumble bacon; add chopped leeks to skillet. Reduce heat to medium-low; cook 8 minutes. Drain potatoes; mash with whole milk, sour cream, kosher salt, black pepper, and leeks. Top with chopped fresh chives and crumbled bacon.