In a large bowl, combine the contents of the roll mix and yeast packets. Stir in the warm water, butter, egg and chives until dough pulls away from sides of bowl. Turn onto a lightly floured surface; knead until smooth and elastic, about 5 minutes. Place in a greased bowl, turning once to grease top. Cover and let rest for 5 minutes.
Turn dough onto a lightly floured surface. Roll into a 15x10-in. rectangle. Transfer to a greased 15x10x1-in. baking pan.
In a large bowl, combine the mozzarella cheese, mayonnaise, onions and olives; spread over dough to within 1/2 in. of edges. Sprinkle with Parmesan cheese.
Bake at 375° for 25-30 minutes or until lightly browned. Cut into 1-1/4-in. squares; serve warm.