To make this Cranberry Brie Pull-Apart Bread Recipe gluten free, substitute the sourdough loaf with a sturdy gluten-free round bread that can hold its shape when sliced and filled. Be sure to confirm that the cranberry sauce, dried herbs, brie, and butter are certified gluten free and free from cross-contamination. Because gluten-free bread can be more delicate, slice carefully and avoid overfilling the loaf so it remains intact during baking.