Combine buckwheat, water, butter and salt in a medium sauce-pan.
Bring to a boil, cover with a lid and simmer on low for 20 minute
When cooked, transfer to a bowl, add additional tablespoon of butter if desired and serve.
Notes
Here's the secret option for a super tasty side dish: add 2 tablespoons of sour cream per serving and some chopped dill into the pot with cooked buckwheat. Mix well and cover with a lid, let sit for 5 minutes and enjoy!