Blend the carrot, onion, celery and mushrooms in a food processor until fine but not pureed.

Heat the oil in a skillet and saute? the mixture until softened, about 10 minutes. Sprinkle with salt along the way to help release the juices.

Preheat the oven to 450°F. In a large bowl, combine the vegetables with the rest of the ingredients.

Form the mixture into a loaf and place in a baking dish. You could also use a loaf pan. Bake for 10 minutes, then reduce the temperature to 350°F. Bake for 30 minutes more. Let cool slightly, then cut into thick slices and serve.