Heat 1 tablespoon of the oil in a large skillet over medium-high heat. Season both sides of bass fillets with salt, pepper and garlic and herb seasoning. Add bass to skillet and cook 1 to 2 minutes per side, until golden brown. Add vermouth and cook 1 minute, to allow alcohol to cook off. Add tomatoes and 1/2 cup of the olives and bring to a simmer. Simmer 5 minutes, until fish is fork-tender.
Reheat rice with the oregano in a medium saucepan (adding a little water if necessary) or in the microwave. Season to taste with salt and pepper.