Much to my mothers dismay - I never measure - afterall recipes aren't carved in stone - they're written on paper.
For the 'shrooms:
some balsamic vinegar (good stuff)
some EVOO (okay stuff)
Liquid Smoke (not too much a little goes a long way with this stuff)
McCormick Montreal Steak Seasoning
Put it all together and poured it over them and let them soak it up for about 4 hours - then just grilled until tender
Tomatoes - chunked up (I like to get all the juices out of them into the bowl for the sauce)
Chunks of Mozzarella
Very good EVOO - dipping quality!!!
McCormick California Style Garlic Salt w/Parsley
Italian Seasoning (Oregano, Rosemary, Thyme )
Let it all get happy together then save the sauce for dipping with crusty bread.