Method
- Preheat the oven to 190°C/Fan 170°C/Gas 5 and line a 20cm springform tin with non-stick baking parchment.
- Melt the spread in a pan over a low heat.
- Meanwhile, put the biscuits in a sealable food bag, bash into fine crumbs with a rolling pin and tip into a bowl. Pour in the melted spread, stir well and spoon the mixture into the prepared tin to cover the base, pressing down evenly. Bake for 12-15 minutes then set aside to cool.
- While the base is in the oven, put 150ml of hot (but not boiling) water in a shallow dish, sprinkle over the gelatine powder and stir to dissolve.
- Put the quark in a bowl and whisk until smooth, then whisk in the yogurt, sweetener, vanilla and gelatine liquid.
- Whisk the egg whites in a bowl until stiff peaks form and fold into the quark mixture.
- Spoon the quark mixture over the biscuit base and smooth the surface with a palette knife. Chill for 4 hours or until set.
- Release the pie from the tin and put the pie, still on its base if necessary, on a serving plate. Thinly slice the bananas and arrange neatly on top, then sprinkle with cocoa powder and slice to serve.
*Pregnant women, the elderly, babies and toddlers are advised to choose eggs showing the British Lion stamp if eating raw or partially cooked eggs.