Line a springform pan with baking paper. Melt vegan butter and let it sit aside. Crumble cookies, preferably with a high-powered blender, and mix it with butter.
Place the cookie crumbs on the bottom of the springform pan and press it down.
Let it chill in the fridge for about 30 minutes.
For the filling:
Heat the water , lemon juice and gelatin sheets or agaragar powder in a small saucepan, stirring constantly, until the sheets or powder dissolve for about 2 minutes.
Blend the cream cheese, yogurt, sugar and lemon zest until smooth.
Allow lemon mixture to cool thoroughly and it stir into the cream cheese mixture.
Whip the cream until stiff, swirl in the cream stiffener and carefully fold it into the cream cheese cream.
Pour the cream into the cake pan, smooth it out, tap the pan slightly on the work surface and let it set in the refrigerator for at least 4 hours.
There will be a small amount of cream left, which can be poured into a jar for dessert.
Carefully remove the cake from the mold before serving.