Potato Gumbo

Name: Potato Gumbo
Ingredients: 1⁄4 cup extra virgin olive oil; 1 white onion, diced; 2 garlic cloves, finely chopped; 2 stalks celery, diced; 1 bunch swiss chard, coarsely chopped, leaves and stems separated; 1 bell pepper, seeded and diced; 1⁄4 cup flour; 2 bay leaves; 2 cups chicken stock; 2 cups water; 2 lbs white potatoes, peeled and quartered; salt, black pepper and cayenne pepper to taste