Cut the tops off the sourdough loaves and gently hollow out the insides, leaving about 1 inch of bread on the sides and bottom to create sturdy bowls. Save the removed bread for croutons or other uses.
In a large skillet, melt the butter over medium heat. Add the minced garlic and sauté until fragrant, about 1 minute.
Pour in the heavy cream and bring to a gentle simmer, stirring occasionally.
Add in the shredded cooked chicken, garlic powder, and nutmeg (if using). Stir until the chicken is well coated in the creamy mixture.
Gradually whisk in the grated Parmesan cheese until melted and the sauce is smooth. Season with salt and pepper to taste.
Remove the skillet from heat and allow the Alfredo sauce to thicken slightly, about 3-5 minutes.
Spoon the chicken Alfredo mixture generously into each hollowed-out bread bowl.
Place the filled bread bowls on a baking sheet and bake in the preheated oven for 15-20 minutes, until the bread is crispy and the filling is warmed through.
Once done, carefully remove the bread bowls from the oven and garnish with fresh chopped parsley before serving.
Notes
Save the removed bread for croutons or other uses.