MIxed fruit crumb bars

Ingredients

• ½ cup brown sugar
• 1 ½ cups flour
• ½ tsp. baking powder
• ¼ tsp. salt
• ½ cup cold butter, cut into pieces
• Zest of half a lemon
• 1 egg
• 2 cups mixed berries and or stone fruit cut into small pieces (this had blackberries, strawberries and plums)
• ½ cup sugar
• 2 tsp. cornstarch
• Juice of ½ lemon
• 1/2 tsp. almond extract