Step 1

Preheat oven to 400 degrees. Lightly spray a 2-quart casserole dish with cooking spray and set aside. In a small saucepan melt 2 Tablespoons butter over medium heat and which in the flour, salt and pepper. Add the whipping cream and stir for about 2 minutes until it starts to thicken. Add ¼ cup parmesan cheese.

Step 2

Arrange half of the zucchini in the prepared casserole dish overlapping each other. Spread half of the sauce on top followed by ½ cup mozzarella cheese. Repeat with another layer of zucchini and sauce topped with mozzarella cheese and remaining parmesan cheese.

Step 3

Bake for 25 minutes or until the zucchini are fork tender and the top is starting to brown. Sprinkle with chives before serving.