Step 1

Preheat oven to 350 degrees F (175 degrees C).

Step 2

In a large bowl, combine oats, pastry flour, salt, 1 cup brown sugar, and baking soda. Mix in the butter until crumbly. Press half of the mixture into the bottom of a 9 inch square baking pan.

Step 3

In a small saucepan over medium heat, combine the dates, water, and 1/3 cup brown sugar. Bring to a boil, and cook until thickened. Stir in lemon juice, and remove from heat. Spread the filling over the base, and pat the remaining crumb mixture on top.

Step 4

Bake for 20 to 25 minutes in preheated oven, or until top is lightly toasted. Cool before cutting into squares.