Seafood Gumbo

2 cups 474ml Vegetable oil

1 cup 62g / 2 1/5oz Diced white onions

1/2 cup 55g / 1.9oz Diced celery

1 cup 146g / 5.1oz Diced green bell pepper

4 Garlic cloves - minced

2 tablespoons 30ml Peanut oil

6 Plum tomatoes - peeled, seeded,

And diced 3 Bay leaves

1 teaspoon 5ml Cayenne pepper

1/2 teaspoon 2 1/2ml Onion powder

1/2 teaspoon 2 1/2ml Garlic powder

1 teaspoon 5ml Crushed dried thyme

1 teaspoon 5ml Paprika

1 teaspoon 5ml Celery seeds

1 lb 454g / 16oz Andouille sausage

2 Chicken stock

2 Raw shrimp - shells off,

And tails left on

2 Cooked crawfish tails

6 crawfish reserved for garnish

1/2 lb 227g / 8oz Lump crab meat

2 Oysters - shucked

Salt - to taste

Freshly-ground black pepper - to taste

Hot pepper sauce and file powder - to taste for Individual servings