Meanwhile, lay lime leaves, 2 per seafood portion, onto a metal or bamboo steamer basket. Slice orange in half crosswise. Squeeze juice from one orange half to make 1/4 cup juice; cut remaining half into thin slices. Layer orange slices on top of lime leaves. Rinse any ice glaze from frozen Alaska Halibut under cold water; place fillets on top of orange slices in steamer and season with salt and pepper.