4 ounces apple juice
4 ounces white grape juice
Green food coloring
1 green apple, very thinly sliced (keep slices in a bowl of water and juice of half a lemon to prevent the slices from turning brown)
Place lime, apple and white grape juices into a cocktail shaker with ice.
Dip a wooden skewer into the green food coloring; you only want the smallest amount. Stir the green end of the wooden skewer in the cocktail shaker until the liquid is just tinted green.
Place the lid on the shaker and give it a good shake. Pour into a martini glass and garnish with an apple slice.