Finely dice all the vegetables and set them aside.Sear the sausage in the dutch oven until golden brown and then place it in a bowl and set aside. Next add the chicken and sear each side. Once the chicken and sausage have been seared, remove them and set the burner to medium. Add the vegetable oil and flour and stir constantly until the roux becomes the color of milk chocolate. This could take up to 30 minuets.
Add the onions, bell pepper, and celery into the roux and cook them until translucent. Then add the garlic and cook for another minute.
Cut the chicken into bite sized pieces and place them back into the pot along with the sausage.
Add the chicken stock, beer, Cajun seasoning, bay leaves and okra and bring everything to a boil.
Turn the burner back to low and simmer with the lid on for 3 to 4 hours.
After the gumbo has been simmering add salt and pepper to taste.
If you want a little bit more spice add your favorite hot sauce, I like Tabasco.
Serve over white rice and top with green onion and fresh parsley.