• Prep: Preheat oven to 400 degrees F. (200 degrees C.) and place the rack in the center of the oven. Line a baking sheet with parchment paper or a Silpat baking mat.

Dough Balls

• Make Dough Balls: Divide the dough into 23 even pieces. Now, focus on 21 of these dough pieces. In each one, place a piece of mozzarella cheese in the center. Carefully fold the dough around the cheese and roll it into a small ball. 
• Arrange In a Tree Shape. To make a tree shape, start with 6 dough balls in the bottom row, then place 5 in the next row above, followed by 4 in the row above that, then 3, then 2, and finally 1 at the top to format a large triangle on the parchment-lined baking sheet. Leave enough space on the baking sheet to create the tree trunk.
• Make the Tree Trunk: Cut the remaining 2 dough balls without the cheese in half, creating 4 smaller pieces. Place them cut side down 2x2 in the center of the base of the tree. 
• Pre-Bake: Brush the tops of the dough with half of the olive oil and sprinkle with 1 ½ teaspoons of the Italian seasoning. Bake for 10 minutes. While it’s baking, mix the Alfredo and pesto sauce in a small bowl and set aside. 

Christmas Pizza Toppings

• Add the Sauce: Remove the tree from the oven and brush the dough with the remaining olive oil. Spoon the Alfredo sauce mixture onto the dough and spread it around, leaving a small gap at the outside edge.
• Add the Toppings: Sprinkle the shredded mozzarella cheese over the sauce and decorate the “tree” with the bell pepper garland and ornaments with tomatoes and pepperoni. Sprinkle the “tree trunk” with the remaining Italian seasoning. 
• Bake: Place the assembled tree back in the oven and bake for an additional 15 minutes or until the crust is golden brown and the cheese is melted. 
• Serve: Transfer to a serving platter and garnish with Parmesan cheese if desired.