chinese tuna steaks on the grill

1 tuna steak
1 t salt
1 t finely ginger root,chopped
1/4 t white pepper
1 t cornstarch
2 t salted black beans
4 green onions with tops
2 t green chilies
1 t cornstarch
1 t water
1 t sugar
2 t peanut oil
1 t peanut oil
2 t garlic,finely minced
1 c chicken broth (or fish stock)
1 spinach (or red-leaf -lettuce)

pat fish dry w. paper towels. mix salt, ginger  pepper. coat both
sides offish with mixture and rub 1 tsp. cornstarch on both sides of fish. cover  refrige