Serve a stovetop green: While the oven is filled with turkey and other fixings, make this bright side on the the range.
Using a sharp knife, remove peel and pith from oranges. Working over a medium bowl, cut out orange segments and squeeze 3 tablespoons juice from membranes. Whisk in mustard and oil until combined, then add thyme and season with salt and pepper. Toss with kale and serve warm or at room temperature.