To prepare a barley with sun dried tomatoes and scallions beans and grains recipe, you'll first need to gather your ingredients. Wash and dry the barles and cut the stems off. Cut the tomatoes in half lengthwise and remove the seeds. Chop the remaining tomatoes into bite-sized pieces. Add the chopped tomatoes to the dry ingredients and toss to combine. Cover the mixture with plastic wrap and refrigerate until ready to use.