Preheat the oven to 450°F (230°C). Put a rimmed baking sheet in the oven to heat.
In a large bowl, toss together the tomatoes and bread, then drizzle with the oil and sprinkle with the salt and several grindings of pepper, tossing well. Spread the mixture on the hot baking sheet and roast until the tomatoes have collapsed and the bread is golden, 15 to 20 minutes. Tear in the basil, use a large spatula to transfer to a serving dish or platter, and serve.