I haven't got a recipe for you, but I use bottled chilli sauce to top off my veggie brews all the time.

A few dashes of Tabasco sauce does the trick used as a last minute seasoning same as salt & pepper.

I like Jamaican Encona sauce even better used in the same way, but it is *strong* and it's easy to blob way too much on!

I got something much less dangerous heat wise (and very tasty) from Sainsbury's recently off of one of their fancy pants foody isles made by 'trees can't dance', a bottle of smoked chipotle sauce: Smokey Chipotle Sauce

Well worth it for that added smokey warmth.