Filled Date Squares

Ingredients

• 1-1/2 cups (350 ml) rolled oats
• 1-3/4 cups (425 ml) flour
• 1/2 tsp (2 ml) baking soda
• 1/2 tsp (2 ml) salt
• 1 cup (225 ml) walnut pieces (optional)
• 1 cup (225 ml) brown sugar
• 1 tsp (5 ml) cinnamon
• 1 cup (225 ml) butter, melted
• 1 lb (.5 kg) pitted dates, finely chopped
• 1 cup (225 ml) sugar
• 1/2 cup (125 ml) water
• rind of 1 lemon
• rind of 1 orange