For sauce, coat a medium saucepan with nonstick spray; heat over medium heat. Add 4 of the green onions and the garlic to saucepan. Cook for 3 to 5 minutes or until onion is tender, stirring frequently. Remove from heat. Add cream cheese, mustard, and sage to onion mixture. Stir until cheese is melted and smooth. Gradually add milk, stirring until smooth.