Roast for 20 minutes or until soft and charred bits are appearing.
Remove the tomatoes and set aside.
Once cooled a little, blend the tomatoes in a blender to make a tomato sauce.
Pulse mushrooms in two batches in food processor or blender until chopped into 1/8- to 1/4-inch pieces.
10 oz Cremini
Heat 1 tablespoon oil in the pot over medium heat and add the mushrooms, cooking stirring occasionally until the mushrooms have browned and a bits are all over the bottom of the pan. This is called a fond, caramelized bits to flavor a dish. Add the salt, stirring it in evenly.
1/3 Cup Olive Oil
Add the carrots, onion, celery and garlic, stir to combine. Cook until tender, about 5 minutes.