I found this recipe on a Japanese cooking site - it calls for fried chicken (floured lightly and then either deep-fried or pan-fried), but I think it would be really tasty using grilled chicken breast. I'm going to test this theory tonight , but in the meantime, here's the sauce and general directions:
1 lb cooked chicken breast - cut into thin fillets or tenders, season w/ salt & pepper, then grill, broil, or bake - don't overcook!
3 tbsp soy sauce
2 tbsp brown sugar
1 red chili pepper, deseeded and minced
1/4 tsp cinnamon
3 tbsp sake or dry sherry - if you really don't have either, use apple juice or weak broth
Chopped chives for garnish
Combine the sauce ingredients in a small saucepan and bring to the boil. Once it's at a full boil, remove from heat.
Dip the cooked chicken into the hot sauce, coating well. Place on a serving plate, and sprinkle generously with chopped chives.