In Eastern European countries, buckwheat is a staple ingredient. My mom prepared buckwheat for us at least once a week and vowed that it would single-handedly prevent me from getting headaches.
Prepare all ingredients for the buckwheat dish. To cook buckwheat: Bring water to boil, add buckwheat and salt to taste, cook on low heat for 20-25 minutes.
Preheat a pan, add butter and onions to the pan. Add diced mushrooms to the mix and cook until it becomes golden brown.
Combine mushroom mixture with buckwheat, let it sit for about 5 min to allow flavors to come together.
Finally, add in fresh green onions and stir to combine everything together. Serve right away.