To start, preheat your oven to 350 degrees F Spray a 9 x 13 baking dish with your favorite cooking oil

Use either fresh or frozen broccoli florets Steam 2 lbs of florets until they are tender Set aside

Melt 2 tablespoons butter in a two quart sauce pan on medium high, then add in 1/8 Cup flour 1 Cup chicken broth 2/3 Cup mayonnaise Whisk vigorously until it creates a thick sauce

While continuing to mix, add  1/2 Cup evaporated milk 1 Cup shredded cheddar cheese 1 tsp nutmeg Allow to cook while stirring to build a rich cheese sauce, then remove from heat

Spread the broccoli in the bottom of the prepared baking dish Pour 1/2 sauce and sprinkle 1 Cup of  cheese over the broccoli Layer 2 Cups cooked, shredded chicken (rotisserie or canned chicken work great)

Pour the rest of the sauce on the chicken and sprinkle  1 Cup shredded cheese on top Bake about 30 minutes uncovered or until golden brown and bubbly