The gumbo-blend vegetables we call for in this recipe contain chopped celery, onion, bell pepper, corn, and okra. If you can't find this particular blend, substitute a mixture of frozen okra and corn.
Heat olive oil in a large pot or Dutch oven over medium heat. Add onion and next 7 ingredients (through celery); cook 4 minutes, stirring occasionally. Increase heat to medium-high. Add chicken broth, water and vegetable blend, stirring well. Bring to a boil. Reduce heat, and simmer for 18 minutes. Add crab, and simmer for 2 minutes. Serve over rice.