Cut the chicken thighs into 1-inch pieces, keeping the shape and size of the chicken pieces as consistent as possible.
In a bowl add the chicken, salt, pepper, minced garlic, grated ginger, rice wine vinegar, soy sauce and sriracha (if using). Mix well. Marinate in the fridge for at least 15 minutes (leave it in the fridge overnight for even more flavour)
Mix flour and cornstarch with the chilli powder in a bowl.
Add the chicken pieces with the marinade to the bowl with the flour-cornstarch mixture and toss them well to coat completely.
Add the vegetable oil to a large skillet or wok and heat up. You can check if your oil is ready for frying if you submerge the tip of a wooden chopstick (or a small wooden spoon) in the oil and small bubbles form around it.
Add in the chicken so the bottom of the pan is covered but not overcrowded. You may have to cook the chicken pieces in 2 batches.
Flip the chicken pieces once they start to brown.
When the chicken pieces are browned on both sides and the internal temperature measures 74 degrees Celsius (165 Fahrenheit), remove them to a plate lined with paper towel and repeat with the remaining chicken.
Once all the chicken is cooked, get rid of the oil and wipe the skillet.
Add the sesame oil in the skillet or wok and heat up. Add the garlic and ginger and fry until fragrant. Remove the seeds (and vein) of the red chili pepper and slice it finely. Add the chili and chopped veggies to the skillet and sauté for just a few moments until the onions start to brown slightly and soften just a little bit.
Add in the tomato paste and chili paste, mix well and sauté for a little while.
Add in the honey, soy sauce and chicken stock and mix well. Mix the cornstarch slurry (water+cornstarch) and add it into the pan. Cook until the sauce thickens and becomes transparent.
Add the chicken pieces back in the pan and toss everything together with the sesame seeds.
Cook the ramen noodles as the package instructs and add them to your pan. Mix well.
Garnish with spring onions and some more sesame seeds. Enjoy!