In a wok with heated neutral oil over medium-high heat, stir fry the garlic and shallots until fragrant.
Add in the curry paste mixture and keep on stir frying it for a few minutes to allow the flavours to come out.
Add in the Chinese cooking wine and mix until the liquid has evaporated.
Add back in the cooked white radish and the liquid that was set aside earlier.
Add in the beef omasum, fishballs, and beef balls and give everything a good mix. Once it comes to a boil, lower the heat to medium-high, and continue cooking for 5-7 minutes, or just until everything is cooked through.
Season the curry by adding salt, sugar, oyster sauce, and soy sauce.
Mix in the cornstarch slurry (mix the 2 ingredients in a bowl first) to thicken the sauce a little.
The fishballs and beef balls should be finished with a glossy and shiny look. Plate and enjoy!