Remove from the microwave, add the sugars and stir to combine.

Add in the flour and stir. Mixture will be dry and crumbly. Set aside about 3/4 of a cup of the crust/crumble topping.

Spoon the remaining crust mixture into a greased 9x9 baking pan. Distribute the crust mixture evenly through the baking pan and press down with a spoon so that it forms the crust.

Add the cup of lemon curd on top of the crust, and sprinkle the top with the remaining crumble mixture.

Bake at 350 degrees for approximately 40 minutes. Remove from the oven and allow to cool for approximately 15-20 minutes. Place into the refrigerator for approximately 1 hour to further set the bars prior to cutting and serving.

Store in the refrigerator in an airtight container until ready to serve. Enjoy!