Wash the lemons thoroughly, grate the peel. Squeeze the juice. Whip cream until stiff. Mix quark, sugar, lemon juice and zest. Fold in the cream.
Pour the quark mixture into four freezer-compatible moulds, smooth it down and freeze overnight in the freezer. For the sauce puree apricots with juice. Select the raspberries and add to the sauce. Hold the ramekins briefly in hot water and turn them over. Arrange ice cream and sauce on four plates, sprinkle with crumbled meringue