In a fine mesh sieve, rinse buckwheat with cold water, drain well and remove any debris.
In a medium pot, add rinsed buckwheat, water and salt. Cover, bring to a boil, reduce heat to low and simmer for 15 minutes or until all water has absorbed. Do not open the lid to take a peek!
After turn off heat and let buckwheat kasha stand for 10 minutes, without opening the lid and peeking inside.
Add butter, gently fluff kasha with a fork, stir and serve warm.
Notes
Store: Refrigerate in an airtight container for up to 5 days.
Freeze: Freeze for up to 3 months. Thaw in the fridge overnight.
Reheat: Reheat buckwheat in a small pot, covered and with a splash of water. Simmer on low heat until warmed through.