Heat oil in a large pot over medium heat. Add onion and cook until translucent, about 3-4 minutes. Add toasted rice flour and cook one minute, stirring constantly. Add water, Onion Garlic Puree, bell peppers, celery, Cajun seasoning, salt, pepper, garlic, tomatoes, and crabmeat, and bring to a boil. Reduce heat and simmer for 1 hour. Add crawfish and parsley and simmer another 30 minutes.