Barbecued Peaches with Amaretti Mascarpone

6 Portions. Halve the peaches and removed the seed. Mix the amaretto and the sugar together in a bowl and place the peaches in it flesh side down for 1-4 hours (covered). Mascarpone: Mix the mascarpone and crushed biscuits together, cover and refrigerate until ready to use. This is best done it the most 30 minutes before serving, as the biscuits will become soggy. Place the peaches on the side grills of a moderate barbecue. Cook for 5-8 minutes flesh side down and then turn over and cook for a further 5 8 minutes. The peaches should have grill marks and be slightly softer. Place 2 halves on each plate; place a spoonful of the mascarpone into the hollow where the seed was, and if you desire pour over a little amaretto onto the peaches. Place 2 biscuits on each plate and serve.