Seafood Gumbo
["2 Tbsp. oil", "1 medium onion, chopped", "1/4 c. finely chopped celery", "1 (6 oz.) can tomatoes", "salt and pepper to taste", "6 Tbsp. flour", "1 lb. crabmeat and shrimp", "2 c. sliced okra", "1 bay leaf", "1 tsp. gumbo file"]
["Brown onion and celery in oil for 1 minute.", "Mash tomatoes. Add to onion.", "Add salt and pepper.", "Cook for 5 minutes.", "Add water to make 2 quarts of gravy."]
["oil", "onion", "celery", "tomatoes", "salt", "flour", "crabmeat", "okra", "bay leaf", "gumbo file"]