Not a sauce - but a spicy dry rub (got it from the WW recipe archive).
For 2 salmon fillets:
1/2 tbsp chilli powder (sounds a lot but its not that hot)
1/2 tbsp paprika
1/2 tbsp cumin
1 tsp sugar
1 tsp oregano
pinch salt and pepper
Mix the dry spices together (I find easy if you stick them all in a freezer bag), drop the fillets in the bag and cover them completely with the spices. Then just spray each fillet with a little spray oil(to stop them burning) and stick under a grill. 3-4 mins each side.
The rub is also nice with chicken
