Any fruit will do - berries, apples, whatever you like. I wrote the recipe for berries because I had to choose, but I've made it often with apples and peaches as well. This recipe is adapted for the Thermomix from balancedbites.com
Place walnuts in Thermomix Bowl. Set lid to closed position and hit turbo 2 or 3 times to chop the nuts. Tip out and set aside.
Place coconut oil in TMbowl. Melt at 50º/speed 1.5/2 minutes. In summer you may not need to melt the oil at all - in winter it may take longer than 2 minutes - just make sure it is completely liquified.
Add the almond meal, maple syrup, cinnamon and salt to the melted oil. Mix 15 seconds/speed 4.
Add the chopped walnuts to the TMbowl and mix the whole lot together 10 seconds/speed 4.
Place the fruit in the bottom of a 9x9 baking pan. Squeeze the lemon over all. Sprinkle on the topping. Don't worry about trying to cover every bit of fruit.
Bake 20-30 minutes - or until crumbly and golden brown.