You'll need :
plain flour (self raising will also do), butter, sugar, a couple of tins of tinned peaches and some frozen raspberries
I've got a 1 litre dish I use for things like this.
Put 2 tins of peaches (sliced or halves will do - just chop into chunks) into the dish and top with a good big handful of frozen raspberries.
Put in 3 or 4 tablespoon of reserved fruit juice from the peaches and sprinkle with a 1/2 dessertspoon of sugar.
Pre-heat the halogen oven for 3 > 4 minutes at 180deg C, then pop this in, uncovered for apprpx 10 mins
Standard crumble mix is 2 parts flour to one part butter and one part sugar
4 oz plain flour
2 oz sugar
2 oz cold butter
Rub these together until they form crumbs, then put on top of the fruit.