For Chilli Oil: Combine the oils, star anise, cinnamon, and ginger in a small heavy pot fitted with a candy thermometer. Set over medium heat and bring to 140 degrees F. Add the garlic and bring to 180 degrees F. Remove from the heat, cool to 160 degrees F, and add the ground chillies, Sichuan pepper, and paprika. Transfer to a storage container and let steep for 24 hours at room temperature, then strain through a cheesecloth-lined fine-mesh strainer. Discard the solids and store the oil, tightly sealed, in the refrigerator for up to 1 month.
For Daikon Cake: Toss the radish and salt together in a small bowl, then transfer to a strainer and set the strainer over a bowl. Let the liquid drain for 30 minutes, then squeeze any excess liquid from the radish and set the radish aside. In a separate small bowl, whisk together the rice flour and 1 cup water to make a slurry. Set aside.
Heat a prepared wok over high heat. Add the coconut oil and when melted, add the minced garlic and ginger and cook until slightly brown and fragrant, about 1 minute. Add the mushrooms and green onions and cook until fragrant, an additional 2 minutes. Add the radish and mix well, then add the preserved vegetable, preserved mustard stems, and sambal and mix to incorporate. Whisk the slurry again and while stirring, add to the wok and thoroughly mix until thickened. Remove from the heat.
Pour the mixture into a standard 9 by 5-inch loaf pan and set aside. Set up a wok half full of water with a steamer basket insert with lid and bring the water to a boil. Place the loaf pan in the steamer, cover, and steam for 2 hours, making sure to add water to the wok as necessary.
After 2 hours, when the cake is solid and firm, remove from the heat and let fully cool. The cake can be wrapped tightly and refrigerated for up to 3 days.
When fully cooled, turn the cake out from the loaf pan. Cut into 1-inch slices, then cut each slice in half crosswise. Heat a large sauté pan over high heat, add the peanut oil, and when the oil starts smoking, carefully lay the squares in the pan (you may need to do this in batches, wiping out the pan and adding new oil each time). Allow to sit in the pan, untouched, until dark golden brown with a slight char, about 2 minutes. Flip and repeat, then remove to a serving platter and set aside.
Heat a prepared wok over high heat. Add the Chilli Oil, then the sliced garlic, and toast for 15 seconds. Add the onion, bell pepper, green onions, chillies, and jalapeño and stir-fry for 60 seconds. Add the stock and stir until most of the liquid has left the pan. Add the XO Sauce (optional) and soy sauce and stir to combine, then remove from the heat and top the cakes with the stir- fry. Garnish with the cilantro and serve immediately.
Notes:
**Can be found at your local Asian grocery store or online.
