In a large soup pot, heat the olive oil over medium heat. Whisk in the flour and cook, it begins to brown and becomes fragrant. Whisk occasionally. It will take about 4-5 minutes. Reduce the heat Add the red bell pepper, green bell pepper, celery, red onion, garlic, and okra, and cook until the veggies begin to soften, about 10 minutes. Add the diced tomatoes, basil, oregano, thyme, cayenne, Cajun seasoning, chili powder, salt and pepper. Cook for 5 minutes.While the gumbo cooks, cook the quinoa according to the packages instructions.Add the chicken broth and the diced chicken. Bring to a boil and then reduce heat to a simmer. Cook for 10 minutes or until chicken is cooked. Add the shrimp and the slurry. Bring to a boil and stir until the gumbo thickens, about 1-2 minutes. Serve over the quinoa.