Cream of Mushroom Soup
Heat oil in a large saucepan set over medium heat. Add mushrooms and sauté until tender; remove from pan and reserve. In the same pan, heat butter over medium. Add onion and sauté until softened, then add garlic paste.
Sprinkle flour over vegetables and stir until a paste forms. Gradually stir in broth until flour dissolves. Bring to a simmer, stirring constantly, until soup begins to thicken. Add half of the reserved mushrooms and their accumulated juices. Reduce heat to low and simmer for 10 min.
Using a hand-held or stand blender, purée soup until smooth (fill a stand blender only halfway and hold lid in place with a tea towel while blending).
Stir in remaining mushrooms, salt, pepper and thyme, and bring soup up to a simmer. Remove from heat, stir in cream, garnish with chives, top with croutons and serve.