In a large bowl beat together egg whites, whole eggs, granulated sugar, honey, liqueur or rum extract and orange juice, vanilla, and salt with a wire whisk or an electric mixer on low speed until light and frothy. Stir in yogurt until mixture is smooth. Add flour; beat until combined and mixture is smooth.
Grease a 10-inch quiche dish; arrange desired berries in bottom of dish. Pour batter over fruit. Bake in a 375 degree F oven for 30 to 35 minutes or until center appears set when shaken. Cool on a wire rack for 30 minutes. Serve warm. Just before serving, sprinkle with powdered sugar and, if desired, garnish with fresh raspberries and edible flowers. Makes 8 servings.