Step 1: Preheat the Oven
1. Preheat Oven: Preheat your oven to 400°F (200°C).

Step 2: Prepare the Garlic Bread
1. Prepare Bread: If using a store-bought garlic bread loaf, slice it in half lengthwise. If making homemade garlic bread, prepare your preferred recipe and slice accordingly.

Step 3: Assemble the Pizza
1. Spread Alfredo Sauce: Spread a generous layer of Alfredo sauce over the cut side of each garlic bread half.
2. Add Chicken: Evenly distribute the cooked chicken over the sauce.
3. Top with Cheese: Sprinkle the shredded mozzarella cheese and grated Parmesan cheese over the chicken. Add Italian seasoning if desired.

Step 4: Bake the Pizza
1. Bake: Place the assembled garlic bread pizzas on a baking sheet and bake in the preheated oven for 15-20 minutes, or until the cheese is melted and bubbly, and the edges of the garlic bread are golden brown.

Step 5: Serve
1. Garnish: Remove from the oven and let cool slightly. Garnish with chopped fresh parsley or basil if desired.
2. Slice and Enjoy: Cut into slices and serve warm!