Heat oven 375F. Line a 9-inch square pan with parchment leaving a 2-inch overhang for easy removal. Spray pan and parchment with non-stick baking spray.
In large bowl, stir flours, sugar, baking powder and salt; cut in butter with a pastry blender or your fingers until crumbly.
Stir in berries and zest. Mix heavy cream and egg together; add to flour mixture, stirring with a fork until dough comes together. Divide dough in half. Pat half the dough over bottom of prepared pan.
Spread jam evenly over dough in pan.
Mix almonds (if using) into remaining dough and crumble dough evenly over the top.
Sprinkle with sparkling sugar, if desired.
Bake 35 to 40 minutes or until golden brown.
Cool. Cut into 3-inch squares.
Top with berries and whipped cream.
Notes
*I grow a French strawberry variety called fraise. The berries are sweet, but maybe only ½-1-inch long. If you use regular strawberries dice them up into smaller pieces.