In a large stock pot, add enough cold water to cover the bones along with bay leaves and peppercorns. Cover with lid half way and bring to a boil on medium heat. Reduce heat to low and cook for 1 hour, straining the foam occasionally (if any).
Preheat large ceramic non-stick skillet on medium heat and swirl oil to coat. Add onion, celery and carrots, saute for 5 minutes, stirring occasionally.
Transfer to a pot along with potatoes, buckwheat, oregano, thyme, salt and pepper. Cover and bring to a boil on medium-high heat, then reduce heat to low and cook for 15 minutes.
Add dill and serve hot hot with a slice of good bread.
Notes
Store: Refrigerate in a pot for up to 5 days.
Freeze: In an airtight container for up to 3 months.
Do not buy raw (light colour) buckwheat, it has to be toasted.