Chicken and sausage gumbo (adapted from Ken Wheaton)

Ingredients

• 5 pounds chicken cut into parts
• 2 pounds andouille sausage sliced
• 2 onions 1 diced and 1 cut into quarters
• 10 cloves garlic 5 minced and 5 whole
• 4 ribs celery, 3 diced and 1 cut into quarters
• 2 bell peppers diced
• 4 bay leaves
• 2 sprigs fresh thyme or 1 teaspoon dry
• 1 bunch green onions green part diced
• 1 cup canola oil plus a tablespoon
• 1 cup flour
• 1 tablespoon worcestershire sauce
• 1 teaspoon filé powder plus more for serving
• cayenne pepper
• salt