Grape bakewell tart

Name: Grape bakewell tart
Prep time: 30 min
Cook time: 1 h 20 min
Total time: 1 h 20 min
Yield: 8 portions
Ingredients: 75 g raw sugar; 100 g unsalted butter; 200 g plain flour; 1 egg yolk; 20 g cold water; 1 pinch sea salt; 250 - 350 g grapes; 130 g blanched almonds; 130 g unsalted butter; 80 g caster sugar; 30 g plain flour; ½ tsp baking powder; ¼ tsp natural almond extract; 1 pinch sea salt; 2 eggs; 2 tbsp jam; 1 - 2 tbsp flaked almonds; icing sugar