Gluten-free rhubarb crumble

I have mentioned that I now need to cook gluten-free. Yesterday, I tried a crumble with Doves gluten-free flour. It was fine - though softer, less crumbly, than a wheat flour version. I thought I detected a faint, soapy (but not unpleasant) aftertaste. But I'll try it again.

The sticks of rhubarb I cooked a couple of weeks ago were quite thick. This batch was thin, as forced rhubarb usually is. That is one reason why the cooking time is shorter; also, I felt that it needed only to be tender, rather than cooked down to compote consistency.

Serves 2

4 sticks rhubarb, cut into short lengths and washed
2dstsp muscovado sugar
1/2 cinnamon stick
1tsp vanilla essence

80g Doves gluten-free flour
40g unsalted butter, cut into slivers
1dstsp muscovado sugar

Turn the oven up to full heat. Place the rhubarb, sugar, cinnamon and vanilla essence in an oven dish, and bake for 10 to 15 minutes, or until the rhubarb is tender to the sharp point of a knife. You may want to give the mixture a stir.

It occurred to me that a way to get butter into manageable portions to rub into flour (for crumble or pastry) would be to cut it off the block in slivers. Measure the 80g of flour, and then shave thin pieces of butter to drop on to it until the scales move up to 120g. Rub in with your fingertips - you do not have to be absolutely thorough. Stir through the sugar.

Scatter the crumble on to the rhubarb, and bake for 30 minutes at gas mark 6/200C, or until the top is golden.