Step 1

In an 8 quart pot, sauté onions, mushrooms, and celery in a little olive oil for 15 minutes or until lightly carmelized.

Step 2

Add carrots, leeks, garlic, tomato, apple, parsley, bay leaves, basil, peppercorns, salt, dulse flakes and water.

Step 3

Bring to a gentle boil.  Turn down to a simmer cover with a with a lid slightly vented for an hour.

Step 4

Let cool.  Strain.