Maple, Plum and Almond Traybake - Maple from Canada

Ingredients

• 1 cup + 1 tbsp softened unsalted butter
• ¾ cup maple sugar
• 3 cups ground almonds, for dough
• ¼ cup ground almonds, for filling mix
• 1 cup + 1 tbsp plain flour, for dough
• 2 tbsp plain flour, for filling mix
• 2 eggs
• 2 tsp cinnamon
• 1 tsp baking powder
• 6 plums, stoned, halved and cut into thin slices (about 6 per plum)
• 3 tsp pure maple syrup (preferably golden colour for its delicate taste)
• ½ cup flaked almonds