Place the chicken into a bowl with the cornflour and a pinch of salt and plenty of black pepper. Toss until every piece is evenly coated.
Heat some cooking oil in a large frying pan or wok over a high heat. Fry the chicken for 6 to 8 minutes, turning regularly, until golden, lightly crispy and cooked through. Remove to a plate.
Reduce the heat to medium. Add the garlic paste and ginger paste to the pan and cook for 30 seconds, stirring continuously.
Stir in the chicken stock, soy sauce, tomato ketchup, honey, and toasted sesame oil. Bring to a gentle simmer.
Pour in the cornflour slurry and simmer for 1 to 2 minutes until the sauce thickens into a rich, glossy glaze.
Return the chicken to the pan and toss until every piece is coated in the sticky sesame sauce.
Dish it up with fluffy rice and some green veg, then sprinkle over the sesame seeds and sliced spring onions.