Cut the bread loaf in half lengthwise. Remove enough bread from the bottom half to create ½-inch deep cavity.
Mix the cheese with the remaining ingredients. Season with salt and pepper. Pack the cheese mixture into the bottom half of the bread. Place the top half of the bread over and press the loaf together firmly. Wrap tightly in foil.
Bake the bread until heated through, about 30 minutes. Let stand 10 minutes. Remove foil; cut the bread crosswise into 1-inch wide diagonal slices and serve.
Notes
You may prepare the stuffed loaf up to 3 hours in advance. Let stand at room temperature, wrapped in foil, until ready to bake.