Key Lime Cake

INGREDIENTS

• 1 tablespoon lemon juice
• 1/2 teaspoon vanilla extract
• 2 cups sifted all-purpose flour
• Flour, for dusting pan
• 1/2 teaspoon salt
• 1 1/3 cups granulated sugar
• 3/4 cup orange juice
• 5 large eggs, slightly beaten
• 1 1/2 cups vegetable oil
• One 1 pound box confectioners' sugar
• 1/2 cup key lime juice (from about 25 small key limes or 4 large regular limes)
• 1 teaspoon baking soda
• One 3-ounce package lime flavored gelatin
• 1 teaspoon baking powder
• One 8-ounce package cream cheese, room temperature
• 1/2 cup (1 stick butter), room temperature
• 1/2 cup confectioners' sugar
• Butter, for greasing pan