Festive Cookies 'n' Mint Pie

• 1 1/2 miniature marshmallows
• 1 few drops green food color
• 1/2 candy (pieces)
• 240 ml whipping cream divided (cold)
• 220 gr cookies n mint chocolate
• 60 ml milk
• 30 ml whipping cream
• 1 package packaged crumb crust