Cut the French bread loaf in half horizontally. Then, cut each half into 4 equal sections, creating 8 bread pieces.
1 loaf French bread
Using a serrated knife, carefully hollow out the inside of each bread section, leaving a shell about 1 inch thick. Discard or save the scooped-out bread for another use.
In a small bowl, mix together the melted butter, minced garlic, and Italian seasoning.
1 loaf French bread
Brush the inside and outside of the hollowed-out bread bowls with the garlic butter mixture. Sprinkle the inside with grated Parmesan cheese.
1 loaf French bread
Place the prepared bread bowls on a baking sheet.
In a medium bowl, combine the cooked spaghetti, spaghetti sauce, shredded mozzarella cheese, and grated Parmesan cheese. Mix well.
1 loaf French bread
Spoon the spaghetti mixture generously into each bread bowl.
Bake in the preheated oven for 25-30 minutes, or until the bread is golden brown and toasted, and the cheese is melted and bubbly.
Let cool slightly before serving.
Notes
For an extra crispy bread bowl, you can lightly toast the hollowed-out bread before adding the filling. Garnish with fresh parsley for a pop of color and freshness.