Put apples & peaches in an ovenproof dish (I used some apples I had cooked myself, with a dash of water and a spoonful of sugar and tinned peaches) then do your topping. Tip some flour into a big mixing bowl, and rub soft butter into it with your fingertips, until it looks like rubble, or sand. You know, like crumble.. Add sugar and taste it to see if it is sweet enough. Then add a small handful of crushed hazelnuts! (I put whole hazelnuts into a bag and bashed them with a rolling pin)
Cook in a hot oven for about 40 minutes, and eat with vanilla ice cream!