Prepare mussels and set aside. Saute onions in olive oil until soft. Add rice and mix thoroughly. Add salt, pepper, spices, currants and pine nuts. Mix well. Add water, bring to a boil and cook for 10 minutes at medium heat. Add cleaned mussels, removed from their shells, mix thoroughly and cook about 10 minutes. Serve at room temperatur, mounded in a dish surrounded by fresh lemon slices. This may be used as an appetizer or as a side dish.