Step 1

Heat broiler.

Step 2

Place fish, skin sides down, on rack of broiler pan sprayed with cooking spray; brush with oil.

Step 3

Broil, 4 inches from heat, 6 to 7 min. or until fish flakes easily with fork. Meanwhile, melt butter in medium skillet on medium heat. Add leeks; cook and stir 5 min. or until tender. Stir in remaining ingredients; simmer on low heat 5 min. or until cream cheese is completely melted and mixture is well blended, stirring frequently.

Step 4

Serve fish topped with sauce.