3 tablespoons olive oil, plus more for dressing  | 
                                                1 spanish onion, finely chopped  | 
                                                2 cloves garlic, finely chopped  | 
                                                2 cups long grain white rice  | 
                                                4 cups water  | 
                                                1 large pinch saffron threads  | 
                                                salt and freshly ground pepper  | 
                                                8 spears asparagus, grilled and cut into 1/2-inch pieces  | 
                                                1 red pepper, fire roasted and diced  | 
                                                1 yellow pepper, fire roasted and diced  | 
                                                3/4 cup salt cured olives, pitted and chopped  | 
                                                1/4 cup chopped fresh herbs, ie: parsley or cilantro leaves  | 
                                                extra-virgin olive oil, for drizzling  | 
                                                2 tablespoons aged sherry vinegar  |