3 sunday special Recipes

unpeeled russet potato , well scrubbed, cut into 1-inch cubes, red-skinned sweet potato), peeled, cut into 1 1/2-inch cubes, carrots, peeled , halved lengthwise, cut crosswise into 1 1/2-inch pieces, parsnips, peeled , cut into 1 1/2-inch pieces, extra-virgin olive oil, unsalted butter, room temperature, chopped fresh sage, garlic clove, pressed, organic chicken, coarse kosher salt, coarsely torn red or green mustard greens, shallot, minced, dry white wine, water