Well, they didn't turn out quite as well as I had hoped. How's that for an opening line? [pause while I watch a youtube video about how to replace my left shift key] So, it didn't turn out specatularly, but the slushie was a pretty color and refreshing. And when temps top 90+ that counts for something. I started by making a ginger brew on the stove, which I sweetened a little, cooled with ice, then dumped into the blender (ginger chunks and all!) with a good dose of frozen peach slices, more ice, and water to make it blend. Which is what made it bland.
I think another time I would use a mild fruit juice (apple, for example) to loosen it up as it blends instead of water. Not a bad first attempt, but has room to improve for sure!