Place the squash on an oven tray lined with baking paper. Combine the oil with the garlic and salt and brush over the flesh of the squash.
Approx. 1 hr. in the centre of an oven preheated to 200°C. Remove and pour away the resulting liquid. Scatter the dukkah over the squashes.
Cook the lentils, uncovered, in the water for approx. 20 mins. until almost soft, drain. Heat the oil in a frying pan. Briefly sauté the onion, garlic and dukkah. Add the lentils, fennel and apple and cook briefly. Stir in the nuts and parsley, season.
stuff the squashes with the filling and scatter the parsley and dukkah on top.