Thank you for the yoghurt recipe Cath - I've heard you can make it in the crock pot so I might give it a whirl one of these days.
Freckle-K, have you tried greek yoghurt? The really thick and creamy stuff. It's divine, and I think it's milder in yoghurty taste.
Daryn, if you meant shortbread, this recipe might interest you - it's super easy and really good. The base is very shortbready. I think you might be able to substitute the lemon in the recipe for strawberries, it will just be less tangy, is all.
http://crepesofwrath.net/2009/02/13/lemon-bars/