This has evolved after years of experimentation with an old family staple. If I'm not very specific with the ingredient quantities, it's because every time I make it it's very slightly different. Ingredient quality and flavour varies a lot as well, so the tasting and seasoning at the end is one of the most important parts of the process. It's a kind of intuitive tweaking, which allows you to really make it your own. Everything bubbles together slowly, allowing all the flavours to really develop. It's a lovely, traditional, easy recipe to make, and always goes down well with all the family.
I hope you'll appreciate the flexibility of this recipe, rather than finding it annoying that I'm not completely specific! I normally find that I tweak most recipes anyway, so what I've tried to do here is give a framework for a really tasty basic recipe, along with the ingredients you can vary to make it your own.