Please 
I know what I want just not sure how to do it or how long for.
I was to make something to go with tonights fish, I am doing asparagus separate.
I want to make something with sliced new potatoes, chopped toms, garlic and courgettes so its like a spanish type sauce thing.
Any suggestons? Can I just bung it all in a pyrex dish and shove it in the oven for an hour