Has anyone here made this?

http://www.deliaonline.com/recipes/type-of-dish/ve.....thyme.html

I've had the pleasure of trying it at a friend's house and it was quite scrummy. So I thought I'd have a go at making it.......

I found directions for how to make self-raising flour (since it's not available here) and managed to acquire other ingredients. So gaily dived in. The result looked about right and had the right texture but the flavour/taste was umm..."blah & salty". The salty factor I can easily adjust. However, am not sure about the "blah". The goats cheese seemed bland (isn't it supposed to be fairly strong?). Also, had to use dried thyme instead of fresh (should this make a big difference?). However, am also a tad confused by the "grain mustard" - what is it exactly? I don't like the stuff so have never had to purchase it before. My options over here appear to a yellow powder (Colemans?), a runny yellow (frenchs), a slimy "dijon" or a lumpy "wholegrain". Any help/insights much appreciated.