To sear the pork belly: Heat the oil in a large pan over medium-high heat. Add the pork belly slices and sear for about 4-5 minutes, or until browned on both sides. Remove and set aside.
In the same pan, add garlic, ginger, spring onions, star anise, and bay leaves. Cook for 1-2 minutes until fragrant.
Stir in the tomato purée, mustard, light and dark soy sauces, and honey. Cook for a minute.
Now deglaze the pan by pouring in the cola and bring the mixture to a simmer. Return the pork belly to the pan. Cover loosely and simmer on low for 30–35 minutes, turning occasionally, until the pork is tender and the sauce is glossy and thickened.
Stir in the chili oil, depending on your heat preference. Simmer for another 2 minutes to incorporate.
Garnish with fresh coriander and sliced red chilies. Serve over steamed rice or with grilled vegetables. Enjoy!