Probably obvious but: Try tomato paste in a curry instead of just tomatoes in curry

Had a crack at a lentil curry last night. Recipe called for 2 cans of tomatoes, but I had a jar of tomato paste open in the fridge so I added that plus a fair bit of water to compensate, plus the originally called for can of tomatoes. The end result was a curry with a beautiful rich gravy. It was thing and dreamy and bound all the curry flavors together in a way I'd never achieved before. Worth giving it ago.