Marinate chicken with a pinch of salt , soya sauce and vinegar for 5-6 minutes.
Meanwhile for preparing orange sauce, heat oil in a pan,add garlic , saute it , now add orange juice.
Mix cornflour with 1 tablespoons of water,and mix it in orange juice,add chilli flakes ,boil it in high flame for 2-3 minutes,stir constantly , put off the flame, orange sauce is ready.
Meanwhile thread marinated chicken pieces onto skewers,heat non-stick grilled pan, brush with oil ,put the chicken skewers on the hot pan.
Now add orange sauce in it, little by little ,put the flame in high .
Grill the chicken 3-4 minutes per side,or until cooked properly.
Serve hot with orange sauce.