Preheat oven to 450F.  Lightly grease a baking sheet or line with foil. Mix the bread crumbs, lemon peel, paprika, oregano, salt and red pepper in a shallow baking pan. Lightly beat the half & half, egg and sugar in a small bowl. One at a time, dip the fish fillets first in the egg mixture and then in the crumb mixture. Arrange fillets on the prepared baking sheet and bake until sizzling & cooked through, 12-14 minutes. Serve immediately with lime-watercress sauce alongside.