Mareblu grapefruit

Preparation:

Preparation: Cut the grapefruit in half and, with the special knife (if possible), extract the raw segments and put them in small pieces in a bowl. Completely empty the skins in order to obtain 4 clean containers. Add the chopped tuna to the grapefruit seasoned with mayonnaise, mustard, brandy, salt and pepper, mix delicately; fill the grapefruits with the mixture and serve garnished with a black olive.