Rhubarb crumple pie

Ingredients

• 1000g rhubarb
• 300g sugar
• 4tsp starch
• custard (1pkt)
• 200g wheat flour
• 4tbs sugar
• 1tsp baking soda
• 100g butter (Or more like 150g next time)

Sprinkle Sugar/cinnamon on top, bake for 45min at 200 degrees