Seafood File Gumbo

Ingredients

• 1 lb. shrimp (medium with heads and shells)
• 5 c. seafood stock
• 3/4 c. vegetable oil
• 2 c. chopped onion
• 2 c. chopped bell pepper
• 2 c. chopped celery
• 3 Tbsp. file powder
• 1 tsp. cayenne
• 1/2 tsp. salt
• 1 bay leaf
• 1/2 tsp. dried thyme
• 1/2 tsp. dried oregano
• 1 tsp. black pepper
• 1 to 3 tsp. Tabasco sauce
• 1 minced garlic clove
• 1 1/4 c. canned tomato sauce
• 1/2 lb. picked lump crabmeat
• 1 doz. shucked oysters with liquor