start by making the roux (directions above)chop the vegetables and set aside until ready to saute.In a Dutch oven, saute the vegetables in 2 T olive oil and 2 T butter until softened. i cook the carrots and celery first, then add the onions since they don't take as long to cook.Add all other ingredients including the roux, stir well.bring to a boil then turn down the heat to low and let simmer 20-30 minutes until the soup thickens to the desired consistency.Stir every 3-4 minutes. Do not leave the soup unattended - it can burn quickly.if you need to thicken the soup a little, mix together some cornstarch with milk or water (per box instructions) then stir into the soup.stir frequently - the soup is milk-based and can burn easily.before ready to serve, take out the bay leavespour into bowls and sprinkle with shredded gruyere cheeseNOTES:You can make this soup ahead of time, then transfer to a crock pot to keep warm until time to serve. Do not put the lid on the crock pot.this soup freezes VERY wellit is terrific used as a topping on baked potatoes - a really delicious meali often microwave a couple of yukon gold potatoes, cubed to add to the soup. (do not freeze with the potatoes)serve with french baguette or other crusty breadenjoy!