Salted Caramel Apple Oat Crumble Bars

Ingredients

• 6 medium Granny Smith Apple (green 🍏)
• 1/4 tsp salt
• 1 tbsp lemon juice
• 1/3 cup (75 g) Light brown sugar packed
• 2 tbsp (28 g) unsalted butter
• 1/2 tsp ground cinnamon
• 1 tbsp Corn flour/Corn starch dissolved in 3 tbsp of water
• 100 g (1/2 cup) granulated sugar
• 28 g (2 tbsp) unsalted butter, softened to room temperature
• 1/4 tsp sea salt/or table salt
• 100 ml (approx. 1/3 cup + 1 tbsp) double cream/heavy cream (warm)
• 1/2 tsp vanilla extract
• 173 g (1 1/3 cup) Plain flour/all-purpose flour
• 142 g (1 1/2 cup) Jumbo rolled oats
• 1/2 tsp baking soda
• 125 g (1/2 cup + 2 tbsp) Light brown sugar
• 140 g (1/2 cup + 2 tbsp) unsalted butter
• 2-3 tbsp roughly chopped Walnuts for the top