Tomato stuffed with cottage-cheese and pesto

I first made this a few years back, after seeing it in some food programme, and have never tired of it.

 
Chop off the top of the tomatoes, remove the seeds, and coat with olive oil.
Crumble cottage cheese, chop olives and mix with pesto sauce (I use store bought, because they taste better than the stuff I make myself).
Stuff the tomatoes with the mixture, and bake till the tomatoes are done (the reason I am vague about time is because I like the cheese to be melted but the tomatoes to remain firm- most people like the tomatoes to be cooked too).