Fill the biscuits into a freezer bag and crumble them finely with a dough roll. Wash 2 limes thoroughly and finely grate the peel. Halve all limes and squeeze out the juice.
Whip the cream until stiff. Mix mascarpone, quark, sugar, lime zest and juice. Fold in cream in 3 portions. Pour crumbled biscuits into 12 preserving jars (approx. 160 ml each). Sprinkle each with 1 tbsp. liqueur.
Spread cream over it and close glasses well.
Wash and quarter the pears, remove the core. Cut the pears into cubes. Divide into 4 toast slices. Cut cheese into strips. Cover toast with cheese. Place on a baking tray lined with baking paper.