The roasting process is super simple! Just take raw tomatoes ( I love cherry tomatoes for quicker cooking), cut them in half, toss them in a little oil and season them with salt and pepper. Then roast in a single layer on a sheet pan in the oven....low and slow. Cook them for a couple of hours at 275˚-300˚F. Or roast them a lot more quickly in the air fryer--it takes only about half the time! See how to roast cherry tomatoes in the air fryer.