I think there may be some problems with this recipe. I followed the recipe as written, but the sauce did not thicken (in reviewing the ingredients there really is nothing in the Sauce to make it thicken), and I ended up adding about 2 Tbls of Soy Sauce to give the dish flavor, as it was very bland as written. I believe the marinade would make a good basis for chicken stir fry, but the sauce needs some adjustments.
This is spicy and wonderful! I let it marinate for more than an hour and used maybe 4 or 5 peppers for the sauce. This doesn't make a lot of sauce, so I didn't have any problem with it thickening - the cornstarch in the marinade was plenty. This went well with Golden Pineapple Rice. Thanks for posting!
Overall, I thought this was very good, but my sauce didn't thicken, either. Maybe adding some corn starch would help the next time. I used a little extra lemon zest and a little extra soy, because I really like it. I also used the spring onions, and I think they really add to the dish.