Proper pizza assembly is key to achieving a perfect pizza in a built-in oven. Start by stretching the dough evenly and creating a thin base. Add a thin layer of sauce, followed by your desired toppings. Be mindful not to overload the pizza with too many ingredients, as this can prevent it from cooking evenly. Finally, finish with a sprinkle of cheese and any additional seasonings. With practice, you'll become a pro at assembling pizzas that cook to perfection.