1In 10-inch skillet, melt butter over medium heat. Cook onions and sugar in butter 20 to 25 minutes, stirring frequently, until deep golden brown and caramelized; stir in thyme leaves.
2Heat gas or charcoal grill. Spread cream cheese evenly over pizza crust. Top with Alfredo sauce, shredded chicken and onions. Place on grill over medium-low heat. Cover grill; cook 8 to 10 minutes or until hot.