Not-Much-Guilt Chocolate-Mint Ice Milk

Yield:	6 Servings
Categories:	Low-Fat, Frozen, Desserts

2 1/2	c	Evaporated skim milk
1/2	c	Mint leaves; fresh
1/2	c	Sugar
2	tb	Cornstarch
2		Egg yolks
2/3	c	Cocoa; Dutch process
1/2	c	Yogurt; skim milk
1/4	c	Semisweet chocolate; chopped