01 -
Preheat oven to 200°C. Allow sufficient time for the oven to reach temperature while assembling ingredients.
02 -
In a 23 x 33 cm casserole dish, combine uncooked elbow macaroni, whole milk, chicken broth, minced garlic, kosher salt, black pepper, Italian seasoning, and red pepper flakes if using. Stir thoroughly to evenly mix and prevent macaroni clumping.
03 -
Cover the dish tightly with aluminum foil and bake for 20 minutes. During this time, pasta begins to absorb liquid and soften.
04 -
Remove from oven and carefully uncover, watching for steam. Stir pasta mixture to ensure even distribution. Add diced cooked chicken, broccoli florets, and approximately 140 g (about 2 cups) of the grated cheddar, reserving 30 g for topping. Mix until chicken and broccoli are evenly coated and cheese begins to melt.
05 -
Sprinkle remaining cheddar evenly over the surface. Bake uncovered for an additional 20 minutes, until cheese is golden and bubbling and broccoli is just tender.
06 -
Remove from oven and let rest for 5 minutes before serving. Top portions with grated parmesan and an extra grind of black pepper if desired.