Old-Fashioned Strawberry Shortcakes

INGREDIENTS

• 3 1/2 cups halved strawberries, divided
• 1/3 cup sugar
• 1/3 cup orange juice
• 2 teaspoons vanilla extract
• 1 teaspoon lemon juice
• 1 1/4 cups all-purpose flour
• 3 tablespoons sugar
• 1 teaspoon baking powder
• 1/4 teaspoon baking soda
• 1/8 teaspoon salt
• 3 tablespoons chilled stick margarine or butter, cut into small pieces
• 1/2 cup low-fat buttermilk
• Cooking spray
• 6 tablespoons frozen reduced-calorie whipped topping, thawed
• Whole strawberries (optional)