2 tablespoons olive oil
1/2 large sweet onion, chopped
1 1/2 cups chopped celery, leaves and all
2 carrots, chopped
1 package mushrooms, sliced
2 cloves garlic, minced
2 russet potatoes, diced
2 bay leaves
a pinch of dried rosemary, thyme and oregano

3 cups cooked, shredded chicken
4 cups chicken broth
1/2 cup white wine, if desired

2 tablespoons butter
2 tablespoons flour
2 cups milk, half & half or cream

2 tablespoons cornstarch mixed with 1/4 cup water