On a Green day you get :
- 57g FRESH salmon as a HEXB (71g if canned in brine)
- 85g low fat soft cheese as a HEX
So if that serves 4 it's 112.5g salmon and 62.5 cheese per person - so you've used both your HEXBs on salmon and slightly less than 1 HEX on cheese, so its Free.
I've got to ask though, why are you doing this on a Green Day? If it was Red or EE the salmon would be free, and your cheese would still be a HEX. On Red you'd still have 1 HEX and 2HEXBs left, even on EE youd have 1HEXB left Whereas on Green you've used nearly everything up just on this one meal.
Rice in a different meal on the same day you mean? In that case Id go Extra Easy. Rice and salmon are both free on EE, your cheese is still a HEX - so you've still got a HEXB left on EE whereas youve spent them all on Green.
Extra Easy is the orange pages in the book. You can eat anything you would on a Red/Green day but you only get 1 HEX and 1 HEXB and a third of every meal must be Superfree.
No worries, you can use nboth HEXes on a Green Day if thats what you want to do.