Melt in a heavy saucepan over medium heat:
Add and brown, about 7 minutes:
Add and cook until the vegetables soften, about 5 minutes:
Add and bring to a boil:
Reduce the heat and simmer for 25 minutes. Meanwhile, melt in a small saucepan:
Stir in and cook, stirring, over medium heat until golden brown, about 8 minutes:
Gradually whisk the roux into the soup and simmer for another 20 minutes, whisking occasionally. Add and simmer for 10 minutes:
Discard the bay leaves. Season to taste with:
Garnish with: