Cook 1 pound halved peeled rainbow carrots in a large skillet with 1/4 inch salted boiling water until tender, 7 to 9 minutes. Drain, then return to the skillet. Add 2 tablespoons butter and 2 teaspoons grated peeled ginger; toss. Add 2 teaspoons each lemon juice and soy sauce; season with salt and pepper. Top with chives.