I had a crack at making chili mussels and it turned out a treat - the first time anyway. I'd bought mussels that were already debearded and so I assumed that all mussels would be similarly debearded, so the second time I made them they were all beardy and furry like little Gandalfs in shells, which I found out when I tried to eat them.
Anyway! You need:
500g mussels (Pt Lincoln, in the shell, preferably beardless

). Shells should be closed - chuck away any opened ones.
1 red chili, chopped finely
4-5 tomatoes, chopped finely
1/2 large white onion, chopped finely
1 cup chicken stock
1/2 cup white wine
Chuck everything except the mussels in a shallow saucepan, put a lid on it and cook on med-high heat for 5 mins. Add the mussels, cook for 2 minutes. By now all the shells should have opened; get rid of any that are still closed. Oh yeah, you're meant to be making spaghetti while all this is going on too.

Serve the mussels over the spaghetti. Bit of a messy dish to eat but it is yum.