Thai Salad Rolls with Spicy Sweet & Sour Sauce

Amazing sauce, and an OK appetizer. I had a bit of trouble getting the rice noodles to soften in hot water, and ended up cooking it. I also just used the lettuce in my refrigerator, rather than buying the specified one - that might have helped.

I was pretty skeptical of the sauce. Brown sugar, rice vinegar, onion, water, hot pepper flakes, and cornstarch. That was about it for ingredients, but it gave a surprisingly complex flavor that is just spicy enough.