Frozen Greek Yogurt

One of the things I am missing on the MCP is ice cream, but I have done well to resist so far. I thought I would make myself a healthy substitute, and chucked some blueberry in some low fat greek yogurt and chucked it in a plastic container in the freezer. That should work, right? Wrong! I am obviously missing some vital ingredient that the shop bought frozen yogurts contain, as mine just came out as a solid block of ice!  I had to practically saw it into four dessert sized portions, then let it thaw for about an hour until I could hack it into smaller pieces with a spoon. The noise of this drove my husband nuts, and it really wasn't worth the effort. Maybe next time I'll invest in some lolly moulds and try fruit juice ice lollies as a post-dinner treat.