Preheat to 425. Halve tomatoes, squeeze out seeds optional, and place in pan cut side up. Drizzle with oil, salt, cook for 10 minutes or so and then flip and roast until some browning. Cook for about 30 overall.
Could broil with cut side down but get more borwn and also sort of squishy instead of roasty.
For Soup
Add red peppers to the pan. When cool enough to handle blend with chicken broth or veg broth.