"Simple, fast, and wonderful hearty black bean soup. Has great robust flavor and is a meal in itself. I made this for a dinner party and my guests loved it. I had to run to the computer, type it up, and hand out copies! Garnish with sour cream and Cheddar cheese."
Heat oil in a large saucepan over medium-low heat. Cook and stir onion, leek, and garlic in the hot oil until softened, 5 to 7 minutes. Add water, black beans, brown sugar, oregano, cumin, bay leaves, salt, and pepper. Cover and simmer until flavors combine, about 20 minutes.
Discard bay leaves from the soup. Serve with croutons.