Pre heat the oven at 180 deg C
Make horizontal incisions on the chicken thighs.
Rub the chicken pieces with salt and pepper and keep aside.
In a bowl or small jug, add the honey, soy sauce, vinegar, crushed red chillies, garlic and lemon juice. Whisk well and keep aside.
Heat a pan and add the olive oil.
Over high heat, add the chicken pieces and cook for 5-6 minutes or till they are golden on both sides. Keep turning over every now and then.
Remove from heat and arrange the chicken in a baking dish in a single layer.
Pour the honey sauce over the chicken. Spoon some of the liquid over the chicken pieces.
Place the baking dish in the centre of the pre heated oven and bake for 30 minutes.
Remove from the oven and spoon some of the sauce over the chicken pieces.
Return the dish to the oven and cook for another 10-15 minutes or till the chicken is cooked completely.
Take out the chicken pieces from the sauce and arrange on a serving tray.
Pour the sauce into a small saucepan and place over high heat. Bring to a boil.
Reduce the heat and simmer for about five minutes.
In a small bowl, add the plain flour along with a couple of tablespoons of the sauce. Mix well.
Add the slurry to the sauce and keep stirring constantly to avoid lumps.
Simmer for a minute or so until the sauce starts to thicken. Do not let it thicken too much as it will thicken further on cooling( see notes below).
Cool the sauce slightly and spoon it over the chicken pieces. Sprinkle the sliced chilli and sesame seeds on top.
Serve with noodles or steamed rice. We had ours with some plain rice and roasted broccoli.