Spring Flower Cake

Name: Spring Flower Cake
Ingredients: Vegetable oil, cooking spray; 3 cups all-purpose flour; 1 teaspoon baking powder; 1/2 teaspoon salt; 2 sticks (1 cup) unsalted butter, room temperature; 2 cups granulated sugar; 1 vanilla bean, split lengthwise, seeds scraped and reserved; 4 large eggs; 1 cup heavy cream; 2 teaspoons vanilla extract; 2 large egg yolks; 1/4 cup honey (preferably orange blossom); 1 large egg white; 1 tablespoon water; 20 to 30 pansies or other edible flowers, plus leaves if desired (see the Guide); 1 cup superfine sugar; 1 cup fresh orange juice, strained (from about 2 oranges); 1/4 cup granulated sugar; 1 1/4 teaspoons orange-flower water (see the Guide)