1 In a medium size bowl, combine the zucchini, potato, green onions, flour, egg, egg white, salt, pepper and thyme.2 Coat a medium size skillet with cooking spray. Melt the margarine in the skillet over moderate heat3 Add the zucchini mixture, shaping it into a cake with a ladle, and cook for about 1 minute. Coat uncooked side with spray.4 Turn the cake over and cook for 1 minute. To serve, cut the cake into quarters. Spoon 1 teaspoon of the horseradish sauce on each quarter, then top with a generous amount of the smoked salmon.5 For the apricot horseradish sauce: mix all ingredients well and refrigerate.
