How do I make my curries saucier? So I've made curry a few times before but I've always had a problem with the sauce. So before I try and make one again I want to know, how do you make the sauce thick and flavourful rather than almost non-existent and overly tomatoey?

When I last made curry I remember adding almost a full ramekin of spices and quite a lot of onion and yet after boiling down the curry I was left with very little sauce. I had tried adding more tomato pulp to give it more body, but that to ends up mostly gone once boiled down; and even if much tomato remains, I find it overpowers some of the other flavours in the sauce.

Does anyone have any curry tips for this amateur?
Ground almonds are one thing I've used in the past (usually in a yoghurt-based sauce, but not always).  They give a richness without overpowering the flavour.  Roughly the approach was: 


Fry onions, meat or equivalent (I usually did this with Quorn), and spices/garlic/ginger. 
Turn off and allow to cool a few minutes.  
Stir in lots of yoghurt (any natural yoghurt) and return to the gentlest heat you've got.  
Stir in ground almonds; don't be mean with them. Cook gently for a few minutes, with plenty of stirring, adjusting the texture with a little water if you like.  


In a tomato-based sauce you don't need the cooling step; that's to avoid splitting the yoghurt.

Coconut flour or alternatively dried coconut milk. It's a significantly different curry because the flavour comes through, but adding either of these gives a good  thickening effect (more so for the flour) that's very compatible with curries.

A sauce base using onions as I mentioned in the comments: a base sauce made from boiled, blended onions (plus garlic/ginger/tomato and a little spice) is also a good way of adding richness.  This is rather time-consuming to prepare, and pungent, but freezes well.

Mango chutney is a good last-minute cheat addition, especially if you find a very sticky one and blend it first.  It adds flavour and has some thickening power.

I am also an amateur, and care more about enjoying my cooking and food than about authenticity!