Simon's Rhubarb "Crumble"

I'm not one for recipes - but here is a rhubarb crumble Jussi and Ailsa seem to like a lot.

- a good lot of rhubarb (8 thin sticks?)
- 2 large oranges
- a good lot of oats (200g?)
- 75g butter (1/4 block)
- a good pinch of salt
- enough sugar

put chopped rhubarb in juice of 1 orange with some sugar. Give it a short stew.
Put oats in a bowl, add diced butter, add juice of 1 orange, add enough sugar and salt. Squeeze it all up. It should be thick and clarty but not stick to your hands.
Put the crumble over the rhubarb mix and bake at 175C for 1/2 hour. Then grill for 10 mins to brown the top.
Let it cool a bit and eat with creme fraiche.