Step 1

Heat oven to 350°F. Spray 13x9-inch (3-quart) glass baking dish with cooking spray. Cook and drain pasta shells as directed on box.

Step 2

In 4-quart saucepan, melt 1/4 cup butter over medium heat. With whisk, stir in flour until smooth. Cook and stir 1 to 2 minutes or until mixture is smooth and bubbly.

Step 3

In 4-cup glass measuring cup, mix broth and whipping cream. Gradually stir broth mixture into saucepan. Increase heat to medium-high; heat to boiling, stirring constantly. Boil and stir 1 minute; reduce heat to medium. Add cream cheese and cook until melted, beating occasionally. Remove from heat. Stir dressing mix into sauce mixture. Pour 1 cup of the sauce into bottom of baking dish, spreading to cover.

Step 4

In medium bowl, mix 1 cup of the sauce, the chicken, spinach, 1 cup of the shredded cheese and 1/4 cup of the green onions.

Step 5

Fill each pasta shell with a heaping tablespoonful chicken mixture; place in baking dish. Pour remaining sauce on top of shells. Cover; bake 35 to 40 minutes or until heated through. Sprinkle with remaining 1/2 cup shredded cheese; bake uncovered about 5 minutes or until cheese is melted.

Step 6

Meanwhile, in 8-inch skillet, heat 1 tablespoon butter over medium heat. Add bread crumbs; stir to coat. Cook and stir 2 to 4 minutes or until golden brown.

Step 7

Before serving, top shells with bacon, bread crumbs and remaining 1/4 cup green onions.