In a large mixing bowl, combine 4 cups of all-purpose flour, 1 packet of active dry yeast, and 1 tablespoon of sugar. Pour in 1 ½ cups of warm water slowly, mixing until a dough forms. Knead the dough on a floured surface for about 10 minutes until it becomes smooth and elastic. Place the dough in a greased bowl, cover with a clean kitchen towel, and let it rise in a warm spot for 1 hour, or until it doubles in size.

Once the dough has risen, punch it down to release the air. Roll it out on a floured surface into a rectangle about ½ inch thick. Sprinkle your generous layer of shredded mozzarella and Parmesan cheese evenly over the surface. Fold the dough in half, pinching the edges to seal in the cheesy goodness. Cut the dough into triangles that resemble tree shapes.

Arrange the dough triangles in the shape of a Christmas tree on a lined baking sheet, starting with the largest pieces at the bottom and layering smaller triangles on top. Preheat your oven to 375°F (190°C), and cover the assembled tree with a towel for an additional 30 minutes to rise slightly.

In a small bowl, whisk together one beaten egg to create your egg wash. Once your Cheesy Christmas Tree Bread has risen, gently apply the egg wash over the top of the dough. If desired, sprinkle your favorite dried herbs on top.

Bake your Cheesy Christmas Tree Bread in the preheated oven for about 20–25 minutes or until the bread is golden brown and the cheese is bubbling. Allow it to cool slightly on the baking sheet before transferring to a wire rack.

Once cooled, present your Cheesy Christmas Tree Bread on a festive platter for everyone to enjoy.