Step 1

Heat oven to 350ºF.

Step 2

Cook macaroni as directed on package, omitting salt.

Step 3

Meanwhile, whisk flour and chicken broth until blended. Cook leeks, pancetta and garlic in large deep skillet on medium heat 8 min. or until white parts of leeks are crisp-tender, stirring frequently. Add cream cheese spread and chicken broth mixture; mix well. Cook 2 to 4 min. or until cream cheese is completely melted and sauce is thickened, stirring constantly. Add shredded cheese; cook and stir 2 to 3 min. or until melted.

Step 4

Combine cracker crumbs and butter.

Step 5

Drain macaroni. Add to leek mixture in skillet; mix lightly. Spoon into 3-qt. casserole sprayed with cooking spray; sprinkle crumb mixture.

Step 6

Bake 20 min. or until heated through.