I don't grow any kind of veggies anymore but I used to grow cayenne peppers strictly to make pepper sauce. There seemed to have been a shortage at the farmer's market last summer and I ended up using serrano. I put the sauce up for a year before using so I don't know how it's going to taste yet. I'm more interested in the flavor more than the heat.
@RickCorey hot and sour soup, I could eat it every day!