Say macadamia nuts and you think hawaii, you think sweet, you think cookies. But ground macadamia nuts make a fabulous and interesting coating for mild halibut fillets baked in the oven and finished with chopped cilantro. Cod or another thick, firm-fleshed white fish can be substituted for the halibut in this recipe. This recipe is found in "U. S. A. Cookbook" By sheila lukins.