Preheat oven to 200C/430F with shelf placed on the highest level. Spray baking tray with oil.
Mix sesame paste and soy sauce in a bowl (to loosen it up, easier to coat chicken). Add chicken, salt and sesame seeds.
Place flour in a separate bowl and coat chicken in flour, shaking off excess. Place chicken on baking tray.
Bake for 12 minutes. Remove from oven.
Flick to broiler/grill as high as it will go with shelf about 15cm/6" from the heat source.
Turn chicken. Broiler/grill for 5 minutes until golden and quite crispy (Note 4), then remove.
Meanwhile, mix together Sauce in one bowl and Cornstarch in another.
Add Sauce and bring to bubble. Add Cornstarch and cook for 30 seconds until it thickens into a thick syrup.
Remove the Sauce immediately from the stove and pour over the chicken.
Toss chicken in Sauce then sprinkle over Sesame Seeds and Shallots/Scallions to serve. Serve with rice.