Rinse the rice under cold water and cook according to package instructions.
Finely chop the garlic, shallot, lemongrass, and red chilli.
In a bowl, combine diced chicken thigh with cornflour, salt, pepper, and a drizzle of vegetable oil to coat evenly.
Heat olive oil in a frying pan over medium-high heat and fry the chicken until golden and crispy on all sides, about 8-10 minutes.
Remove chicken and set aside. In the same pan, add garlic, shallot, lemongrass, and red chilli; sauté until fragrant.
Add soy sauce, hoisin sauce, rice vinegar, a pinch of sugar, and a splash of water; stir well to create a sauce.
Return the chicken to the pan and toss with the sauce until coated and heated through.
Blanch the green beans in boiling water for 2-3 minutes, then drain.
Serve the crispy pepper chicken over cooked rice with green beans on the side.
Sprinkle toasted sesame seeds on top before serving.