In a stewing pan, add enough water to meat to barely cover. Season with salt, bring to a boil, and simmer until tender, about 1 hour. remove meat and drain, reserving stock.
Sauté onions in butter or oil until golden brown. Add tomatoes and continue sautéing 5 minutes. Add meat and brown. Stir in curry powder; continue cooking until flavors have blended. Add enough of reserved stock to make stew of desired consistency.