Mashed Potatoes and Leeks With Thyme

3 lbs russet potatoes (about 6) 6 leeks , chopped, washed well, and drained (white and pale green parts only) 6 tablespoons unsalted butter 1 tablespoon fresh[...]

4 ounces center-cut bacon, cut into 1/2-inch pieces 1 tablespoon unsalted butter 8 ounces turnips , peeled, cut into 1/2-inch dice (about 1 1/2 cups) 1 1/2[...]