Spread cherries out on a wax paper lined cookie sheet and freeze until solid. I left them in freezer over night and until I was ready to use them the next day.
Set a medium size bowl into a larger bowl filled with ice water. This will be used to cool your ice cream mixture before refrigerating it.
In a medium sauce pan over a medium heat, milk, cream, 3/4 cup sugar and salt until steam appears and liquid is hot but not boiling (175 degrees); stir often. NOTE: I used a candy themometer.
In a seperate bowl, whisk the egg yolks and 1/4 cup sugar until smooth.
Once the liquid mixture is hot, slowly whisk 1 cup of the hot liquid into the egg mixture to temper the egg yolks. Slowly whisk the tempered egg mixture back into the hot milk mixture. Continue cooking over a medium heat until hot but not simmering (185 degrees). Remove from heat and add white chocolate and stir until melted. Pour custard into bowl set in ice water and allow to cool for 10 minutues; stir occassionally. Once cool, cover bowl and refrigerate at least 6 hours or over night.
Right before you start freezing your ice cream, melt chocolate in a double boiler over water that is hot but not boiling; heat until chocolate is melted and smooth. Stir in oil and tranfer to a ziploc bag.
Pour ice cream mixture into canster (1 1/2 quart) and freeze according to manufacturers instructions until mixture resembles a thick whipped cream and then add the frozen cherries. Snip the corner of the ziploc back containing the chocolate and slowing drizzle chocolate into ice cream mixture while the machine is still running. Continue to freeze you ice cream until it shuts off or resembles a thick soft serve ice cream. Transfer ice cream to an air tight container and freeze until firm (2 to 3 hours).