Preheat oven to 350 degrees Fahrenheit.
Cut a loaf of French bread in half. Smear a thin layer of garlic butter on each half.
Tossed the pre-cooked sliced chicken in some Alfredo sauce and layered it on top of the garlic butter.
Top the chicken layer with the ribbons of spinach, sliced red onions, real bacon bits, and shredded mozzarella cheese. Sprinkle with freshly cracked black pepper, to taste.
Bake at 350 degrees Fahrenheit for 20 minutes until cheese melts and slightly browns. Serve immediately. Refrigerate any leftovers.