Begin by cooking the fettuccine according to package instructions. Once cooked, drain and set aside.
While the pasta is cooking, prepare the bread boules. Carefully cut the tops off each boule and hollow out the insides, leaving about a 1-inch border. Keep the tops for later use.
In a large skillet, melt the butter over medium heat. Add the minced garlic and sauté for 1-2 minutes until fragrant.
Pour in the heavy cream and bring it to a gentle simmer. Stir in the Parmesan cheese and nutmeg (if using), continuing to stir until the cheese is melted and the sauce is thickened. Season with salt and pepper to taste.
Add the shredded chicken to the skillet and mix until the chicken is coated in the Alfredo sauce. Stir in the cooked pasta until evenly combined.
Fill each hollowed bread boule with the chicken Alfredo mixture, packing it in lightly for stability.
Place the filled bread bowls on a baking sheet and bake in the preheated oven for about 15-20 minutes or until the bread is golden and slightly crispy.
Remove from the oven, garnish with chopped parsley, and place the tops back on the boules if desired.
Notes
Serve with a small salad and extra Parmesan for garnish.