Strawberry soda

Hi guys, I just started a ginger ale soda yesterday and am pretty excited about that, I was wondering if anyone had any strawberry soda recipes for a naturally carbonated strawberry soda? One optimized for a two litre bottle that I can add yeast to for natural carbonation? Same idea as Yooper's ginger ale (the one I just started). I have a load of strawberries just sitting in my freezer needing something to be done with them. Any help would be awesome. Thanks!