Make Sauce: Combine all ingredients into a bowl and set aside.
Make Slaw: Combine all ingredients in a large bowl, tossing well. Set aside.
Cook Beef: Heat oil in a large frying pan over medium-high heat. Add the onion, garlic and ginger and cook, stirring often, for 2 minutes. Add the beef mince and cook, breaking up large lumps with a spoon, for 6-7 minutes or until well browned and lightly caramelised.
Add Sauce: Pour in the prepared sauce and cook, stirring, for a further 1-2 minutes or until thick and glossy.
Serve: Divide rice between serving bowls and top with mince and slaw. Drizzle with Kewpie mayonnaise and garnish with toasted sesame seeds.