Preheat the oven - Preheat your oven to 475°F (245°C) and place a pizza stone or baking sheet on the middle rack. This will ensure the pizza gets crispy and perfectly cooked.

Prepare the pizza dough - If using store-bought pizza dough, follow the package instructions to bring it to room temperature. If making your own dough, roll it out into a 12-inch (30 cm) round shape on a lightly floured surface. Transfer the dough to a pizza peel or the back of a baking sheet dusted with cornmeal.

Spread the gochujang sauce - Spread a thin layer of gochujang sauce evenly over the dough, leaving a small border for the crust. Adjust the amount of sauce according to your spice preference.

Layer the kimchi and red onion - Evenly distribute the kimchi and sliced red onion over the sauce. The combination of the spicy and tangy kimchi with the mild crunch of red onion adds a burst of flavors to the pizza.

Sprinkle the mozzarella cheese - Sprinkle the shredded mozzarella cheese over the toppings, ensuring it covers the entire pizza. The melted cheese will create a deliciously gooey and stringy texture.

Bake the pizza - Carefully transfer the pizza from the pizza peel or baking sheet to the preheated pizza stone or baking sheet in the oven. Bake for about 12-15 minutes or until the crust is golden and the cheese is melted and bubbly.

Garnish and serve - Once baked, remove the pizza from the oven and garnish with freshly chopped cilantro and a drizzle of sesame oil. Sprinkle black sesame seeds and crushed red pepper flakes for added flavor and presentation. Let it cool for a couple of minutes, then slice and serve hot. Enjoy the perfect fusion of Korean and Italian flavors!