Mix the chicken pieces with cornstarch in a bowl, ensuring each piece is coated evenly.
Let it rest for 5 minutes.
In a medium saucepan, combine chicken broth, sugar, vinegar, dark soy sauce, sesame oil, chili paste, and garlic.
Bring the mixture to a boil over medium-high heat.
Heat enough frying oil in a pan to cover the chicken pieces, until it reaches 375 degrees F.
Fry the chicken in batches until they turn golden brown.
Drain on paper towels.
In a large skillet or wok, add canola oil and a drizzle of sesame oil over high heat.
Once hot, add fried chicken and cook for 2 minutes.
Pour a bit of sesame sauce over the chicken in the skillet, tossing to coat well.