Berry Berry Frozen Yogurt (Healthy; For Ice Cream Machine) - cooking recipe

Ingredients

3/4 cup whole milk (or you can use 2%or 1%, etc. for even lighter ice cream)
1/3 cup granulated sugar
4 cups low-fat vanilla yogurt (or non-fat)
2 cups frozen unsweetened mixed berries, thawed and pureed (if you want HUGE pieces of strawberries in your ice cream, don't puree it!)
1 teaspoon vanilla extract

Preparation

In a medium bowl, mix the milk and sugar until the sugar is dissolved (about 1 to 2 minutes on low speed).
Stir in the yogurt, berry puree and extract.
Freeze according to manufacturers instructions.
NOTE: the ice cream gets really hard if its put into a container in the freezer. I put it in a plastic bowl. I had to defrost it in the microwave for a little while before I could dig into it. Anyone know a better container I could put it in? I was thinking an empty ice cream container that I'd already used all the ice cream from?