Cook the meat and onions for filling in frying pan until onions are soft and meat is browned.
Soak bulghour in enough water to cover for one hour. Blend the lean meat with salt, then add bulghour and knead as well, adding water a little at a time until mixture is smooth. Divide into 2 portions. Spread one portion in bottom of a buttered baking pan, flatten evenly with wet fingers. Spread the filling, then cover with the other portion of meat and bulghour mixture. Flatten again evenly. Cut into diamond shapes. Put a small dab of unsalted butter on each diamond, sprinkle a little water on the top and bake in 350 degrees oven for 3/4 hour.