Preheat oven to 450F/230C. If using a pizza stone (highly recommended), place it on the bottom rack and let it heat up with the oven.
Divide dough into thirds. Shape each piece into a round pizza crust. Stretch the dough with your hands and use a rolling pin, if necessary. Sprinkle with flour if it gets too sticky.
Place each pizza on a piece of parchment paper. This will enable you to slide individual pizzas in and out of the oven with ease. (Without parchment paper, the pizza will stick to the baking sheet and/or the kitchen counter where you are assembling.)
For each pizza, top with 1/2 cup marinara sauce, 1/3 cup kimchi, 4 strips bacon, 1 cup cheese, 1 green onion, and 1 Thai chili. Repeat until you have 3 pizzas.
Bake each pizza until the crust looks golden and the cheese has melted, about 7-9 minutes per pizza. (You can also bake multiple pizzas at the same time, if you have enough room on your pizza board.)