Smoky Potato Leek Soup

3 tbsp. vegetable oil 3 leeks (use the white & light green parts) thinly sliced 1 rib of celery and 1 carrot 1/2 tsp. salt 1/4 tsp. dried thyme 1/4 tsp. pepper 3 Yukon gold Potatoes (2 lbs.) peeled and chopped 4 cups chicken or vegetable stock 4 cups strongly brewed Lapsang Souchong ( 10 […]