Rye and buckwheat whole wheat dumplings. Rye, buckwheat and whole wheat dumplings are similar to oatmeal quick-frozen dumplings. Rye, buckwheat and whole wheat dumplings are handmade vegetarian dumplings made from whole grains. Oats are an ancient crop. There were written records more than 2,000 years ago. Oats are one of the eight major cereal crops.