Onto a large baking sheet, spread sliced cherry tomatoes.
Drizzle with olive oil and sprinkle with salt and pepper.
Using a rubber spatula or your hands, toss to fully coat tomatoes.
Spread out into a single layer.
Sprinkle evenly with one half of the grated parmesan.
Roast for 10 minutes.
With a spatula, lightly toss and spread out evenly again.
Sprinkle evenly with remaining parmesan and roast for another 10-15 minutes or until tomatoes are wrinkled, the juice released thickens slightly and the parmesan cheese is browned (but not burned).