What can I do with dried peppers?

Blend it into a powder and make chili powder?

One of my old friends used to make a really great enchilada sauce with dried chilis. Pretty sure he would rehydrate them and blend

I use them to make salsa. toast 3 or so in skillet then boil/simmer for 30 minutes in 3 -4 cups of water. Toss out the peppers and use the broth/ water in the salsa mixed with roma tomatoes, onion, garlic, cilantro, tomatillos, oregano.

I also put them in my stock while cooking it down. Gives the stock a spiciness. Only do this if you are using stock for something spicy...i.e. gumbo, etouffe, court boullion.