Leave oven at 400° Fahrenheit and line a baking sheet with foil.
Add tomatoes, peppers, carrots and garlic and toss with salt and olive oil.
Arrange the vegetables skin-side up and roast until soft and tender, for about 30 minutes.
Once done, remove from oven and allow to cool enough to handle.
Peel the skins from the tomatoes and peppers and discard.
Re-season the peeled sides of the peppers and tomatoes lightly with salt and pepper.