Marinate chicken with olive oil and poultry seasoning for 10 minutes.
Cook chicken until golden, then set aside. Slice bread and prepare garlic butter spread.
Spread garlic butter on bread halves and toast at 350°F for 5-10 minutes.
Make Alfredo sauce with butter, garlic, parsley, cream, and cheese. Spread on bread, top with chicken and mozzarella, then bake 5 minutes until cheese melts.
Notes
For extra flavor, sprinkle additional parsley or red pepper flakes before serving.