Recipe calls for Thai chili powder. Im not sure what that is or what brand to buy? Can you help? Im also wondering if I can just substitute a tsp of thai chili paste?

If you cannot find Thai chili powder you can substitute with another chili powder or use a bit of chili paste. Here is a great site for food/ingredient substitutions that you may want to book mark. Cheers!

Hello everybody. I used a stainless steel frying pan and it did the job quite good. None of the ingredients stuck to it. Then I could enjoy a better dish than the ones I tryied in restaurants. An al dente texture for the noodle made a great difference. Thanks a lot!

Is there a substitute for the radish?

You may be able to find some substitutions here at Cook's Thesaurus, (under Chinese Radish) but I am not sure that there is a perfect substitution for pickled radish. Cheers!

Thank you!

Could I simply buy roasted peanuts and cut them up ?

Yes, you can use already-roasted peanuts. Cheers!

The palm sugar I bought is really hard and difficult to scoop out,is that normal ? Could I microwave it for a few seconds to soften it so I can more easily remove it from the jar.

Indeed, hard palm sugar can be microwaved. Attached to the recipe is a drill-down about palm sugar that talks about this. Cheers!

How long will the sauce keep ?

Since this sauce contains components that all last for a very long time on their own, the sauce will keep for several weeks in a tightly-sealed container in the refrigerator. As with all things, make sure you taste it/smell it before using to make sure. Cheers!

I just completed a four week Thai cooking series in Oakland, CA taught by a Thai lady fiercly committed to "authentic" thai cooking. I wanted to give Rouxbe kudos for having much more authentic ingredients and techniques in your Thai based recipes than you see in most websites or cookbooks in North America. From the tamarind paste, dried shrimps and preserved cabbage, to soaking the noodles in cold water, you perfectly matched the "authentic" approach we just learned. Thanks for putting up such a quality product!