This is the kind of dish you should learn to make by heart. By any other name, this is baked feta. Put it in a cazuela, or a small oven-to-table casserole dish, and you have a filling lunch or first course served with toasted pita. Naturally, this is superb with summer tomatoes, but it will also improve the washed-out winter tomatoes that may have found their way onto your kitchen counter. Improvise and improve to your own liking as you go, and this dish will never let you down.