In a large pot, melt the butter over medium-high heat. Add the onions and cook for 2 minutes. Add the leek and carrot, and cook, stirring, until soft, about 4 minutes. Add the beef, Essence, salt, and pepper, and cook until browned, about 4 minutes.
In a small bowl, combine the flour with 2 tablespoons of stock to make a slurry. Add to the pot and stir well. Add the remaining stock, bay leaf, and bouquet garni, stir well, and bring to a boil. Lower the heat to medium-low and simmer, partially covered, until the meat is tender, about 1 hour to 1 1/2 hours, stirring occasionally.
Remove the bay leaf and bouquet garni and discard. Add the parsley, and garnish with rosemary popcorn and rosemary sprigs and serve immediately.
Yield: 4 to 6 servings