Slice bread in half lengthwise creating two long halves. Place, cut-side-up, on greased baking sheet.
In small bowl, combine 1 cup cheese, mayonnaise, butter, chives, Italian seasoning and garlic salt. Spread on bread, covering entire surface of bread. Top with remaining cheese.
Bake in a preheated 375°F oven 12-15 minutes or until cheese is melted and bubbly. Cut into strips. Serve with warmed pizza sauce.