Light Orange-Honey Cake
["2/3 c. freshly squeezed orange juice", "1/2 c. honey", "1/4 c. olive oil (or butter)", "2 large eggs, separated", "2 tsp. finely grated orange zest", "1 2/3 c. unbleached flour", "1/2 c. sugar", "1 tsp. baking powder", "1/2 tsp. salt", "1 Tbsp. powdered sugar (for dusting)"]
["Preheat oven to 350\u00b0.", "Spray bottom and sides of an 8-inch spring-form pan with nonstick coating.", "Lightly flour the pan."]
["freshly squeezed orange juice", "honey", "olive oil", "eggs", "orange zest", "flour", "sugar", "baking powder", "salt", "powdered sugar"]