Preheat the oven to 400.

Meanwhile, place the pizza though in a flat surface. Pour the Alfredo sauce over the pizza though and spread it all throughout equally.

Arrange the sisig over the Alfredo sauce. This is best done using your hands (it will be better if you wear plastic gloves during the process).

Arrange the onion and sliced finger chili on top. Sprinkle chili flakes all over the pizza.

Put the pizza in the oven. Bake for 20 minutes.

Remove from the oven. Slice.

Serve. Share and enjoy!