In a bowl, mix together sriracha, honey, lemon juice, olive oil, and crushed garlic until well combined.
Add chicken breasts to the marinade, turning to coat evenly. Cover and refrigerate for at least 1 hour, or up to 2 hours for deeper flavor.
Remove chicken from the fridge 30 minutes before cooking to bring it to room temperature.
Preheat the oven to 180°C (fan). Heat a drizzle of olive oil in a frying pan over medium-high heat.
Sear chicken breasts for 2–3 minutes on each side until golden brown, then transfer to a baking dish.
Bake the chicken for 35–45 minutes, depending on the size, until fully cooked and the internal temperature reaches 74°C (165°F).
While the chicken bakes, cook the rice according to package instructions until fluffy.
Slice the spring onions lengthwise and soak them in iced water until they curl and become crisp.
When the chicken is done, let it rest for 10 minutes before slicing.
Serve the sliced chicken over the cooked rice. Spoon over the remaining sauce from the baking dish, and garnish with spring onions and sesame seeds.