Peel the hard boiled eggs and cut in half. Carefully scoop the yolks out.
Place the yolks into a small bowl. Mash them with a fork. Add mayonnaise, garlic powder, dried mint, salt and black pepper; mix well. Spoon the yolk mixture into the cavity in each white half.
On top of each yolk filling, place a slice of black olive. Add a drop of mustard sauce (using as pupil). Cut the olives into the shape of eyelashes and insert them into the yolk mixture. Chill until time to serve. Serve with cracker.