Rhubarb Crumble Pie

I always have Rhubarb growing in my vegetable garden its a great winter sweet.
This one is great served with cream and is comforting on a cold winter night.

Rhubarb
4 cups chopped rhubarb
2 cups sugar
3/4 cup water
Combine sugar and water in pot bring to the boil stirring till sugar has dissolved add chopped rhubarb simmer till rhubarb is cooked, cool

Crumble
125gms soft butter
1/2 cup sugar
1 1/2 cups flour
1 cup oats
1/2 cup chopped walnuts
1 teaspoons mixed spice
Mix all crumble ingredients together
Press 2/3 of crumble over base and side of greased dish.
Fill with Rhubarb sprinkle with remaining crumble.
Bake for 30-40 mins at 180 degrees C
Dust with icing sugar serve with cream